ALAN CUMMING: This is "Masterpiece Mystery!"

CASSIE: David Walker was last seen May 1990.

His remains were found in a river.

ANDREWS: Multiple suspects.

Possible multiple assaults on children.

Well, I know you'll be aware of how carefully we need to tread here.

Surely it's time to tell the truth.

MAN: You are beginning to scare me.

Zoe?

CASSIE: If I'm right, there are going to be more bodies.

CUMMING: "Unforgotten," (thunder claps) (whimpers) (click) Two London detectives on the trail of an old murder-- Detective Chief Inspector Cassie Stuart and Detective Sergeant Sunny Khan.

She's warm, strong, calm.

He's hardworking and diligent.

She's divorced, he's a single father.

They have family conflicts-- who doesn't?

They're ordinary cops seeking answers from ordinary people in a labyrinth of interconnected lies, regrets, and memories.

Ordinary lives involved in a terrible thing that happened 30 years ago.

But there's no such thing as ordinary.

"Unforgotten" season two.

♪ ♪ (engine humming, distant shouting) (machinery running, water splashing) (indistinct talk) (machinery creaking) TOM: Well, in you get, then.

TOM: Come here, let's have a go.

Ready?

(grunting) Here we go, let's get it off.

(grunting) (coughing) (coughing) ♪ ♪ ♪ All we do is hide away ♪ ♪ All we do is, all we do is hide away ♪ ♪ All we do is lie in wait ♪ ♪ All we do is, all we do is lie in wait ♪ ♪ I've been upside down ♪ ♪ I don't want to be the right way round ♪ ♪ Can't find paradise on the ground ♪ ♪ ♪ SUNNY (on phone): Say again?

Why can't Chigwell pick it up, or Edmonton?

I'm not sure, really.

Andrews just rang me and told me it was ours.

(children shouting) Hold on one second, boss.

Will you two please be quiet?

I'm on a work call!

Quiet!

SUNNY: Yeah, sorry, I...

Listen, listen, I know it's late.

For me it was this or Time Team Revisited, so.... GEMMA: You were watching it yesterday!

You coming past me?

♪ ♪ ♪ ♪ (car engine stops) Mum, it was my birthday.

So what time did it finish?

God knows-- 4:00, maybe 5:00.

Oh, God, your neighbors must love you.

They were the last to leave.

And was Alice there?

Alice and I split.

Oh.

Right-- another one I never met.

I'm not sure you would have liked her anyway, so... Oh, don't matter what I think of her, Jase.

I just want you to be happy.

Yeah.

You want another one?

Um... oh, go on, then.

Quick one, then I should shift-- Paul's cooking.

Yeah, me too-- flat's totaled.

(chuckles) ♪ ♪ I mean, my sister did it when she split up with Michael.

No...

I don't know-- it's not really my thing.

One in four marriages last year started online.

Yeah, I'm sure.

I just don't really fancy ending up standing in front of some bloke I've been on three dates with in my bra and knickers.

Oh, that bit never bothers me.

What, you in your bra and knickers?

(chuckles) Evening.

Evening, sir.

Which way?

Just go over the bridge and round to your right.

CASSIE: Thank you.

(indistinct chatter) ♪ ♪ (engine rumbling) ZOE (off screen): Because.

What, because you... you want to watch EastEnders, or because you want to go out, or because you're feeling sick?

I'm always feeling sick, on account of the cancer.

Do you have cancer?

ZOE: Just, really, what's the point?

Oh, yeah I know.

You do everything you're meant to do, and you fight with every fiber in your body, and turns out cancer doesn't care.

So by all means, have that cry, and just tell me that you're scared.

And if you like, you can give out in here as well, 'cause that's not really going to make any difference.

But please, please, don't stop taking the chemo, because in the end, that is all we've got.

Never, ever, become a therapist.

And please piss off before I top myself.

LINGLEY: And according to the local council, the river was last dredged in 1994.

Right.

Obviously that doesn't necessarily mean this went in the water after then.

The last dredge could have just missed it.

CASSIE: Sorry, to me, this looks way too preserved to have been in here for any serious length of time.

Ordinarily I'd agree.

But there are potentially a couple of unusual factors here.

Firstly, the body was in a sealed case, meaning very little got in.

And then, secondly, if the conditions are right, sometimes a body that's been left in water undergoes a chemical change called saponification, which effectively seals and preserve the body.

So how old could it be?

Oof.

Hard to say, but easily five, ten, 20 years.

Maybe longer.

Wow.

Male, do you think?

'Cause that looks like a bloke's watch.

Let me get everything back to my lab.

We'll get the remains out, clean them up, and see where we are.

CASSIE: Yeah.

Call me when you're ready.

Thanks, Fran.

(indistinct conversations) Popular picnic spot, apparently.

All the people who've sat here-- families, lovers, old ladies eating their egg and cress.

And just a few yards away...

I hate egg and cress.

Do you?

Mm-hmm.

I don't mind it.

(door opening) Hi, Jason.

Oh, hi, Cath.

Sorry about your party.

I had to work late, and by the time I got back, your lights were out.

Yeah, well, everyone was knackered, so...

It wasn't a late one.

Another time maybe.

Yeah, yeah, that would be nice.

Do you want to fix a date now, or... Well, let me have a look at my diary and I'll... Sure, no problem-- night, Cath.

Oh, uh... (door closes) ♪ ♪ (door closes) MARTIN: Hiyah.

In here.

Hey, love.

How'd it go?

Fine.

What?

Oh...

They're all lovely and everything, but...

They're all little old ladies, aren't they?

And you're an old man, old man.

Yes.

Well, thanks for that.

I'm going to head up.

Dad, sorry, I didn't... No, no, it's all right, hon.

I'm just felling a bit bushed-- I'll see you in the morning.

Love you.

How about I get an extra flight to Spain?

Becca wouldn't mind-- he's always great company.

Oh, Paul, that is so kind of you.

Oh, come on.

Hey.

He'll be okay.

Hmm?

He's a cracking lad.

Someone will see that one day, they will.

Hmm.

Hmm?

On three.

One, two, three.

♪ ♪ (camera shutter clicks) ♪ ♪ Yeah, as I suspected, it is a Blanchard.

You can just see their mark on this rim.

Oh.

I never heard of it.

They went out of business in the early '90s.

The seals kept going, which (chuckles) wasn't brilliant on a diving watch.

Do you know if they have serial numbers inside?

Not this model, annoyingly.

So, not helpful, then, in terms of dating the body.

Maybe we should be concentrating on the suitcase.

Well, this is a watch.

Though not a premium one, it still cost the best part of a grand.

So if it goes wrong, you get it fixed.

And any watchmaker fixing a watch will leave a little mark on the inside plate.

Now if I can get this off, we might find the date, firstly, but more importantly, we might find a name.

So if this watch was fixed at some point, you think we could probably identify the watchmaker?

And if you can identify them...

They might be able to tell us whose watch it was.

(seagulls cawing) COLIN (off screen): In mitigation, your honor, I would ask you consider the side of Jordan that he hides, very successfully, from any figure of authority he comes into contact with.

And that is the side of this young man who spent all of the profits accrued from selling the drugs he was arrested for on a week at a holiday camp for his younger brother, Liam.

If I may?

The younger brother who, like Jordan, was taken into care before he turned six.

The fact is, Your Honor, what Jordan needs, in fact, what he desperately wants, is help with his addiction.

Because Jordan is, at heart, a kind and decent young man.

And I would ask that we help him show the world what he is truly capable of.

JORDAN (off screen): Laters, bruv.

I sincerely hope not.

Say hiyah to Liam for me.

Will do.

See you, Col!

Oh!

Excuse me.

♪ ♪ (toy clicking) Are you serious?!

The most important day of our lives.

You nearly gave me a bloody heart attack.

(laughs) Oh, what are you worried about?

We've got at least... 15 seconds.

Oh just hold me up a minute, will you?

Daddies!

Hey!

Hi!

Hello, my darling girl.

Shall we go home?

Yeah!

Yeah!

You all right, you ready?

Yeah.

Yeah, good.

You all set?

Oh, she's been so excited.

(all saying goodbye) Pizza!

Pizza, yes.

And carrot sticks and some fruit.

♪ ♪ (cars starting) (engine revving) ♪ ♪ (phone ringing) Smith?

OLIVER: I'm afraid so.

But we do have an initial.

W. Smith.

12.06.89.

Yep.

CASSIE: And 4.02.90.

In the absence of a serial number, this is your best bet of identifying the owner.

COLLIER (on phone): So I've started in January 1990.

Yeah, good... COLLIER: And for now I've taken it to 1995.

Fair enough.

COLLIER: And that brings up only 1.5 million missing persons.

Oh, please.

COLLIER: Now, as we're pretty sure it's male, That narrows it down to about 750,000.

Still missing after five years, that narrows it down to one percent of that figure.

Yeah, that's still seven-and-a-half thousand.

Yeah, sorry.

Yeah, hold fire on that for now.

Thanks, Jake.

COLLIER: Guv.

I think that's it there.

MAN (off screen): Obviously there are quite a number of Smiths, though the initial does narrow it down quite a bit.

I should also say there are many thousands of watch repairers who don't belong to our guild, and we don't keep records of.

Right.

But listen, give me half an hour.

I'll see what I can do.

Thank you so much.

(phone rings) Oh, will you excuse me?

(phone rings) Dr. East, how we doing?

SARA (off screen): "Come, you spirits "that tend on mortal thoughts.

"Unsex me here, "and fill me from the crown to the toe, top full of direst cruelty."

"Unsex me here."

So why is she talking about sex in this scene?

Why, when we might suppose that she has more important things on her mind... What's more important than sex?

(laughter) Why is she saying this?

Jaz.

'Cause she isn't talking about sex in that way.

She means, like, gender.

Very good.

But women murder.

They do.

Like Myra Hindley, Charlize Theron.

(laughter) No, no, it's a good point Karim's making.

But like Aileen Wuornos, who I think you're referring to, like almost all female killers, when women do kill, they generally kill for a man, or because of a man.

What Shakespeare is saying here is that it's not really in their nature to murder.

(bell rings) Two sides, please, for Monday-- "Is Lady Macbeth more evil than her husband?"

Don't touch me.

I said don't touch me.

SARAH (on phone): So there's some lamb burgers in the freezer, and they can have them with spaghetti hoops and broccoli?

Ah, I think we're covering all the food groups there.

And I should be back by nine-ish.

Cool.

You nervous?

No, terrified.

Ah, you'll be fine.

How many do you reckon they're seeing?

SARA: Dunno-- loads, though.

I thought you said it was in special measures.

Exactly.

Who wouldn't want to turn a school like that around?

HASSAN: All right, teachers are weird.

Says the man who adds up for a living.

Yeah alright, piss off-- love you.

Yeah, love you, too-- bye.

Oh!

Oh, why not?

SIMON: Well, because I thought we agreed fresh fruit for brekkie, and 'cause Daddy Colin said no.

Oh right, I knew it would end up being somehow my fault.

Please, Daddy?

Please, Daddy?

All right, one packet.

Yes!

Oh, look!

Nope!

Yeah, lets not push it, eh, Flo?

Come on, yogurt.

I hope you all die of AIDS.

The kid, too.

So it is a male.

Height, approximately five-nine, ten.

And from the extent of the saponification, I'd say he was probably a little overweight.

Age-wise, I'd estimate somewhere between 30 and 50.

Okay.

Cause of death.

CASSIE: Wow.

EAST: Was in his chest cavity.

I'm guessing a kitchen knife.

The handle's maybe rotted away, or perhaps even snapped off at the time of entry.

Right.

Based on the striations and width of the blade, it would certainly have penetrated the heart, and the victim would have bled out fairly quickly.

Okay.

EAST: So we found nothing else in the suitcase.

But when I was examining the body, I noticed something a bit odd about the area directly below the wound, as he was laying.

I had a bit of a dig around, and eventually I pulled out this.

What is it?

Well, the waxy material is what I told you about, the hydrolyzed body fat.

Yeah.

But it's what it's collected around that's interesting.

CASSIE: Jesus.

It says "Andersson", who were a telecoms company.

I'm guessing it was in his shirt pocket.

I think it's the remains of a pager.

I'm sure we brought it.

SIMON: Hold on-- I will find it in a second.

Here we go.

You all right?

Yeah, yeah, just a bit nervous, I think.

We're gonna be fine.

Will we?

One hundred percent.

And in ten weeks time, she'll be ours for good.

Trust me-- they're not going to revoke the adoption because we gave her Honey Squares.

Right-- seat belt on, please.

I'll open those for you in one second.

Let me just do this.

(indistinct conversation in background) (key scraping) Okay.

Obviously, for your sake, I would have hoped there'd have been less.

Trust me... We thought it would be worse.

SUNNY (off screen): Email the ones that I've marked, and attach a photo of the watch, and Oliver's photo of the engraved signature.

I'm going to visit some of the central London ones in person.

(indistinct conversations) No, that's not me.

You're sure?

Absolutely positive.

Okay.

So the email I sent you, do you recognize that signature?

LINGLEY (off screen): No?

Okay.

No, no problem.

We'll be back in touch.

Thanks for your time-- bye.

COLLIER: Not to worry; you have our details if anything changes.

Cheers, bye-bye.

BOULTING: Okay, thanks for your time.

♪ ♪ (keys jingling) Hiyah.

In here.

There you go.

MARION: Hello, my darlings!

We're having fish fingers again!

We've run out of quail's egg and lark's tongues.

Well, there's nothing wrong with fish fingers.

A fish finger sandwich is one of the finest inventions known to man.

Hear, hear.

(doorbell rings) I thought you said 5:00.

That's what she told me.

Oh, hi, love.

Hi.

I thought you said 5:00.

No, I said 4:00-- party starts at 6:00.

Oh, right, 4:00-- well, it's 4:25.

ELISE: Marion, don't start.

MARION: Well, Tony's just served up-- they're still eating.

Oh, I'm so sorry, Tony.

Sorry-- I did tell Marion 4:00.

Well, she didn't but...

It's not a problem.

Come on, boys-- we need to get going, because I want you dressed and showered by the time everyone arrives.

Do you want me to put it in a doggy bag?

Uh, no, don't worry, I'll give them a sandwich or something when we get home, but thank you so much.

TONY: All right.

So I'll see you later, and don't be late.

Bye, boys-- we'll see you later.

Bye, Aunty Marion.

Have you got everything?

Yes, thank you.

BOY: I got in first.

Come on then.

Off we go.

Jump in the back-- bye!

MARION: Bye!

(door closes) (sighs) (car starting) What's that?

What?

Right, that was evil.

(laughs) It's all going in.

No.

3-C-X, and that's it.

Okay.

CASSIE (on phone): So try Andersson first, see if they can help.

Okay, thanks, Fran.

♪ ♪ Hi.

I-I'm looking for Nathan.

Yep, that's me.

Oh, right, blimey.

Last time I saw you, you'd just wee-ed your pants all over my sofa.

I'm Adam Stuart's mum.

Ah.

Hi, Mrs. Stuart-- yeah, he said you might pop in.

I mean, you were only nine, so, you know, I've moved on.

He said you had a pager that you wanted me to look at.

♪ ♪ CASSIE: And this was released in?

NATHAN: 1989.

And did this have a... what...

I don't know, SIM, or... No, this is a pager.

SIMs were only in phones, and only 2G, which wasn't launched till '91.

Okay, so how was information stored on it?

It's a basic data chip built into the pager itself.

And these chips held how much data?

Very little-- maybe last 20 messages.

Which were just... were they just numbers, or... Oh, no, it's alphanumeric, so it could receive messages 29 characters long.

Okay, so given what I've told you, and where it's been for the last however many years, what do you think the chances are that we could pull any data off it?

What we'd need to do is source a working version of this model.

How do we do that?

eBay.

Yeah, and then we de-solder the data chip from this, solder it into the working version, and see what we get.

But it-it's possible?

It's a microchip made of silicon-- anything's possible.

♪ ♪ Good to see you, mate-- give my best to Emma.

We'll be in touch very soon.

Ms. Mahmoud, so sorry to keep you waiting.

Would you like to come in?

Yes.

Hi.

Hi.

(door slams) ALL: ♪ Happy birthday to you ♪ ♪ Happy birthday to you ♪ ♪ Happy birthday dear Joy ♪ ♪ Happy birthday to you!

♪ (cheering and applauding) All right, here we go-- wish me luck!

(laughs) (all shouting encouragement) Oh, come on, Mum-- you can do better than that.

Come on!

Loads of puff.

(cheering and applauding) What?

No, you're right-- it would be a big leap for me, heading up a school.

But I've headed up a sixth form for five years now, and so, um...

I'm confident that I could successfully make the, um, leap...

Sorry, I said "leap" twice... With the right support.

And I would relish the opportunity.

So... Yeah.

♪ ♪ (door slamming) Sorry, hi there.

Hi.

I just...

I wanted to say...

I wanted to say there are going to be better qualified candidates than me, better managers, more eloquent speakers, definitely.

But I promise you this-- you will never, never find a candidate who understands the sorts of kids you have at Highbrook better than me-- a woman who left school at 16, who didn't get a single qualification till she was 25, who knows what it feels like to be written off, what it does to you inside.

Which is why I've never written any kid off, no matter how challenging, in my entire career.

And why, if I got this job, I would fight with my dying breath to make Highbrook the school that every single kid who comes here deserves.

And I'd be cheaper, too.

Thanks for your time.

Have a good evening.

(murmured conversation) ♪ ♪ Oh, I blew a few candles out-- get a life, Elise, come on.

Which I had expressly asked you not to do, because she said she wanted to do it herself.

I cannot seriously believe you are making a fuss about this.

I just wanted her to be center of attention for once.

Says the woman who insisted on having the party here.

We could hardly have got 50 people in to your house, could we?

She didn't even want 50 people, Elise.

Oh, please, do not even try and tell me what Mum wants.

You don't even begin to understand what she wants.

Oh, and you do, of course, because you're the golden child, so... No, I am not the golden child, Marion.

I just didn't piss off for the best part of a decade.

Oh, here we go...

So the relationship I have with her, I have earned.

Who wants a top up?

No, we're leaving.

What?

Oh, my god.

I'm sure it's what they both want anyway.

What the hell happened?

(sighs) I'm so sorry, Tony.

You always get caught in the bloody crossfire.

Right, well, say sorry to Joy for me.

I will.

See you.

Marion!

Marion, slow down!

If you defend her, if you say one bloody word, I swear... (stammering): You didn't even say goodbye... Oh, Marion, listen.

(car starts) (engine revving, tires screeching) (seagulls calling) SIMON: Is that fun?

COLIN: Hey, what is going on here?

Having fun at this time of night?

Come on, it's bed.

Come on.

Let's go on up.

Ah!

I'll take her.

Come on, come to me.

Up-ah!

Say good night.

Love you-- night.

Sleep well.

Love you.

What if something goes wrong?

But what if it doesn't?

But what if it does?

(silly voice): But what if it doesn't?

(laughing) Come on, you, scooch down.

You're safe now, Flo.

Safe with us, okay?

No one's ever going to take you away.

Okay?

Okay.

Love you, sweetheart.

I love you, too.

Night, Daddy.

See you in the morning.

Night-night.

She's asleep.

She's down?

Mm-hmm.

Well done.

♪ ♪ Excuse me!

Excuse me, sir!

I think that could be my uncle's signature.

SUNNY (on phone): Hey, I think we may have found our watchmaker.

You serious?

Yeah, I spoke to a Patrick Smith earlier-- he... (television playing) Shh!

(quieter): I spoke to a Patrick Smith earlier.

He thinks that, uh, the signature is his Uncle Bill's-- used to run the business, and, well, he's gonna check, and I'll speak to him in the morning.

Okay, sounds good.

How did you get on with the pager?

CASSIE: Yeah, we found a secondhand one on eBay, so we'll know one way or the other tomorrow.

SUNNY: Okay, well, progress.

CASSIE: Yep, I'll see you tomorrow.

Yeah.

Girls!

(door closing, TV playing) Hey.

Oh, hi, love-- how'd it go?

God, no idea.

There's at least ten people going for it, though.

Yeah?

Yeah, and the actual interview was a bit of disaster, but... YOUSEF: Sorry, no offense, Mum, but Jesse might be about to kill Gale.

No.

No way will Jesse kill Gale.

Not a chance.

♪ ♪ (laughing) Bye, sweetheart.

Bye, Daddy, I love you!

I love you, too.

Be good!

Colin?

Hi.

How you doing?

Yeah, fine, thanks-- how are you?

You don't remember my name, do you?

Uh... No worries-- I'm Tyler... Tyler, Tyler, of course.

Uh, you're... you're Milly's dad, is that right?

No, no, no, I'm not a parent here.

Well, not technically, anyway.

I'm a stepfather.

All right, who to?

Flo-- I'm her birth mum's partner.

What-what the hell?

It's okay, look-- I just wanna talk.

About what?

You shouldn't be making contact with me.

Colin, listen.

No, no, no, no, no.

How the hell did you find out where I... it's mad.

I can't talk to you.

Of course you can.

I saw you yesterday.

In the supermarket.

Have you followed us?

I can guess what he said to you, that bloke, so I don't blame you for what you did.

Would make me pretty angry, too.

But I guess others might not be so sympathetic, though.

what with you being a lawyer and everything.

What do you want?

Like I said, just a talk.

TESSA: With the greatest respect, 25 years of this mob's enough for anyone.

Well, I hope it goes without saying that you'll be very sorely missed.

But no, in all seriousness, I've loved every single minute of it.

Well, you were always a natural, Tess.

I suspect it's going to be early next year, probably April.

Well, just let me know as soon as you decide, and we'll start organizing a party.

Absolutely.

What we gonna do without you, Tess?

Ah... All right, T. The wonders of eBay.

So please be prepared for this not to work at all.

The data chip could get damaged as I remove it.

It could get damaged as I put it in the new pager.

It's okay, I get it.

I'll call you.

Or I can wait.

I'll call you.

Okay.

TYLER: I don't want to be here.

You know, I have pride, like you.

And I love Flo-- you know, we both did.

Do.

But if you knew the childhood Sal had had.... 'Cause she was never taught how to do it, you see, be a good mum... How much do you want?

You know, she's been clean for three months now, Col. Colin.

Which is the longest time ever.

which makes it even harder, knowing Flo's in the same city, just a few miles away, being brought up by someone else.

And she absolutely knows it's for the best for Flo.

How much?

Five thousand.

Just to move.

Money for a van and a deposit on a flat.

We've seen a place in Hastings.

We're not bad people, Colin.

We just want the same as you-- the best for Flo.

I-I need to think.

Give me your number-- I'll call you.

Have you got... (paper crinkling) ♪ ♪ (beeping) Yeah, but just remember, Zoe, as hard as this is for you, I actually sometimes think it's harder for them, you know?

Well, I can't imagine anything worse than being a parent and seeing their child in pain and not being able to do anything about it.

So maybe just need to cut them a little slack sometimes, you know?

'Cause they're under immense pressure too, aren't they?

Yeah.

Okay, listen, I've gotta go, but I'll see you on the ward on Friday, okay?

Bye.

MARION: All right, bye, love.

Hiyah!

Who was that?

Oh, Zoe, the girl with Non-Hodgkin's.

Oh, right.

She's got your personal number?

How was your morning?

Yeah, great.

Um...

I got the sash window job.

Great-- listen, I've gotta shift, 'cause I'm on at two.

Marion?

Yeah?

Uh, do you wanna talk about last night?

I'm really late, love.

See you.

Here we go.

Three months either side of when the repairs were done.

Ah, brilliant, thank you.

Good luck.

SUNNY (off screen): So I got Patrick Smith To dig out the business account statements for three months either side of the dates the repairs were done.

So I thought that if I could find payments that were made on or around the repair dates, that were made by the same person, chances are that could be our man.

So I did.

The first one's here.

It was made on the 21st of June 1989, a week or so after the first repair-- a credit card payment made by a Mr. D. Walker.

And the second one, made on February the 14th, 1990, about ten days after the repair, payment made by a Mr. D. Walker.

Genius.

Then I checked missing persons.

And here he is... Mr. D. Walker.

(sighs) ♪ ♪ David Ewan Walker.

39 years old.

Last seen on the 8th of May, 1990.

Five-nine tall, blue eyes, brown hair.

Last seen in The Cricketers Public House, Cannon Street, London.

If you have any information on David's whereabouts, please call Winston Hill police station And help reunite David with his wife... and five-year-old son... Who desperately wants his daddy to come home.

♪ ♪ (doorbell ringing) Hello.

Hello, we're looking for Tessa Walker.

I'm DCI Cassie Stuart, this is DI Sunil Khan.

I'm Tessa Nixon-- I haven't been Walker for eight years.

Right.

Can we come in, Mrs. Nixon?

Why?

Can we?

(sighs) Is this... Is this David?

Yes, we think so.

TESSA: Where did you find him?

His remains were found in a river.

In a river?

The Lea.

So when do you think he died?

Probably not long after he went missing.

How on earth does a body survive 26 years in a river?

I'm a copper myself.

I've seen what water does to a body.

How, how... How do you even start to identify remains from that long ago?

His remains were found in a suitcase.

(sighs) I assumed that it was suicide-- wasn't it?

We've found pretty good evidence to suggest that David was murdered.

Oh!

(phone alert chiming) I'm so sorry.

(Tessa sobbing) That was your husband, Mrs. Nixon.

He's on his way now.

(sobbing) ♪ ♪ (Flo talking softly) (laughing) (inaudible conversation) So, what are the next steps?

Well, we'll need a DNA swab from your son, if that's okay, to confirm that it is David.

CASSIE: And, obviously, we'll be accessing the original files into his disappearance.

Um... but in light of these new developments, when would it be convenient for us to talk further with you?

You could do it here, or at our station.

Well, your nick'll be fine, and whenever's good for you.

What about tomorrow?

After lunch, maybe.

Yeah, fine.

Thank you.

Once again, I am so sorry for your loss.

63 percent of all murder victims are killed by their partners.

You'll be thinking that, won't you?

I would be.

We'll see you tomorrow, Tessa.

Yeah.

(dog barking in distance) SUNNY: Well, she looked how you'd expect, didn't she?

Shocked.

Upset.

But...

But she'd know how to fake it better than most.

(phone rings) Oh.

Nathan.

NATHAN (on phone): We have some code-- it's binary.

Right, and that's good?

NATHAN: I need to do some work on it.

But right now, we have a date.

15th of February 1990.

And we have some words with lots more to come, I reckon.

Thank you, Nathan.

NATHAN: Night.

CASSIE: And so it begins.

CASSIE: So yesterday, we believe we identified the body in the case as David Ewan Walker, reported missing on the 10th of May 1990.

The postmortem confirmed that David Walker died as a result of probably a single stab wound to the chest.

So... We're looking for his killer.

Pure and simple.

For whoever robbed a five-year old child of the opportunity to ever see his dad again.

A boy, well, no, he's a 31-year-old man now, who has apparently spent the last 26 years praying that his father would still turn up... Hey, Mum.

CASSIE: ...alive.

What?

♪ ♪ So the data chip from the pager we found on his body is still being analyzed, But so far, we've pulled information off it going back about, um, 12 weeks before he died.

Now, I'm not sure how much you children know about pagers, but this one was alphanumeric, which meant as well as leaving it your phone number, you could send it short messages, like a text.

Now, obviously, the more we can decipher, uh, the more of an insight we can gain into his movements in the last few weeks of his life.

So Fran, can you talk to BT and see if they can help fill in the gaps of any of these phone numbers?

Yeah.

And a bottle of, um, champagne... DETECTIVES: Whoo!

SUNNY: Prosecco.

Budget cuts.

To whoever can decode this message.

Myself and DI Khan will learn everything we can about David Walker from his widow.

And Murray and Jake, can you dig out the original files?

Let's see what that investigation turned up.

Okay, thank you, everyone.

♪ ♪ SARA: Hey, boys.

Hi.

(television playing) Hiyah.

HASSAN: Hi, love.

Oh!

This came for you.

By bike.

I got a second interview.

Oh... Get in!

(engine running) And can you let me know when Dr. Samuels is in?

Yeah, sure.

NICOLA: Oh, Marion.

Hey.

Have you got a minute?

Yeah.

She just said that she was finding it hard to speak to her parents, and that she loved our chats and that she... Well, she just asked if I'd mind if she could phone my mobile occasionally.

Right, and when was this?

Oh, gosh, about a month ago?

And how many times has she... called you on your mobile?

Twice.

Uh, yesterday and then about a day or so after she first asked me, I think.

So it's not, it's not, like, a regular thing, really.

No, no, no, no, not at all.

And I-I would've put a stop to it if I'd thought it was getting out of hand.

I mean, it's obviously great that you've developed such a strong rapport with her, and I know how much you helped her.

I just think we need to reset the boundaries a bit now and just say no more personal calls.

Okay, yeah, sure.

Well, look, I'll speak to her parents and reassure them.

They just felt a little bit... undermined about it.

Okay, no problem, and I'm sorry if...

Okay, thanks, Marion, cheers.

Sorry, who, who told them?

Zoe's parents, I mean?

Zoe, I presume-- who else?

(telephones ringing, devices beeping) (exhales) ♪ ♪ All my life, I've thought he walked out on us.

TESSA: I know.

But I always said we didn't know that for sure.

Best-case scenario, Mum.

Worst-case, he topped himself, his five-year-old kid wasn't enough to stay alive for.

I mean, can you imagine what 26 years of thinking that does to you?

No, I can't.

(stammers): And then to find out it was this?

That he did nothing wrong.

That he did still love us.

I feel... Cheated, I feel, I feel robbed.

I know-- me, too.

I'm so sorry, mate.

For you both.

JASON: Who would have wanted to have done that to him?

Who would have wanted to have hurt my dad?

♪ ♪ (waves lapping) ♪ ♪ Don't nudge my arm.

(giggles) All right, you finish it off.

Give me one second.

What is it, Col?

What's the matter?

Nothing.

These are meant to be the happiest weeks of our lives.

I'm fine.

Everything's absolutely fine.

♪ ♪ (engine revving) We went out for about five years on and off.

Uh, finally got married in '81, we had Jason in '85.

Mm-hmm.

And it was a happy marriage?

Yeah, well, happy as any.

How do you mean?

Well, no marriage is perfect, is it?

No, no, I guess not.

No, I mean... We loved each other, but, uh... David had his issues, um...

Periods of fairly serious depression.

And that put a strain on things.

And this depression was caused by... one thing, or...?

Well, no, I think that's the point of depression, isn't it?

That there isn't anything obvious to be sad about.

Sure.

I mean, certainly I never really worked it out.

In the end, I think it was...

I think it was just how he was made.

And you said all this to the original investigation?

Yeah.

I mean, I think I did, I mean... God, it was a long time ago now.

(clears throat) Indeed.

We... found the remains of a pager on your husband's body.

Yeah, he had a pager.

Do any of these numbers or messages ring any bells for you?

Right, well, if that's...

If that's, "Call me," that's the sort of message I often sent.

I mean, I probably even sent something like that when he went missing.

Hmm.

But nothing else rings any bells on that list?

Mmm, no, no, sorry.

(clears throat) ♪ ♪ (computer beeps) (mouse clicks) ♪ ♪ SUNNY: Can I just ask, did you both work?

He did-- I stayed at home after Jason was born.

And what was his job?

He worked in the leisure industry.

Clubs and nightclubs.

And was that successful?

Yeah, I mean, David worked incredibly hard.

He was also one of those guys who was always on the right charity board and did loads of voluntary stuff, raised funds for the local Tories... What, what I'm saying is, he was well-connected.

He-he went missing on the eighth, but you didn't report it till the tenth.

No.

Why was that?

He, he sometimes went away on work-related stuff, and would neglect to tell me, but never two nights.

When he didn't come home that second evening, I rang the police first thing.

I assume you tried to call him.

Many times, at work, and those calls were logged by the original investigation.

And they said what?

His office said he hadn't come in that day, and that no one had seen him since early evening of the eighth.

And where was that?

At a pub in Cannon Street.

And with anyone or...?

Two Tory party members.

He left at 7:00, saying he was off to meet a potential donor.

And, um, well, that was the last time he was seen.

In the weeks and months afterwards, what did you think?

Well, for a long time, I...

I thought he'd finally had a full-on breakdown and just... disappeared to some... backwater.

SUNNY: He was that troubled?

In the absence of any better explanation, it was the best answer I had.

And as the months and then years went by...

I just assumed he'd gone off and killed himself somewhere.

CASSIE: I presume the business came to you.

Yeah, it, it did, yeah, eventually, and, uh, for all his ambition, and endless years of 14-hour days, it wasn't actually worth much.

All I know is Jason and I ended up with less than 30,000.

So I joined the police force, six months after he disappeared, mainly because I was so impressed with the officers on his case, but also because I needed the money.

Hm.

Okay, thank you.

♪ ♪ Fasting gives us criteria.

It gives us guidance on what is right and what is wrong.

(man continues speaking) Sister.

As long as people keep taking it down, I will keep sticking it back up, Omar.

We've had so many complaints, Sara.

And so have I.

From other women made to pray in that room.

It's tiny, it smells... We have limited space.

Fine, we swap, then.

We have your room, you have ours-- simple.

Bye, Omar.

♪ ♪ (keys rattle) (television playing soccer game) Evening, all.

Hello, love-- good day?

Yeah, not bad-- you?

I just put down the phone on Adam.

He might come down next weekend, celebrate my birthday.

Oh, that'd be nice.

He tell you about his girlfriend, what she did?

(chuckles) He seemed to think it was a selling point.

What do you mean, selling point?

The term "threes up" was used.

Ewww, no... At which point, I reminded him I've got an irregular heartbeat.

Youth of today.

Lucky bastards.

(laughs) Oh, meant to ask you, what were you doing in Winchester last Wednesday?

Winchester?

Yeah, I found a train ticket in your jeans pocket.

I was about to put them in the machine.

(chuckles) I suppose I, um... must have picked it up accidentally in the pub.

Oh.

Last Wednesday I was playing pitch and putt with Bob and Jem in Acton.

Right.

Yeah, no worries.

♪ ♪ TONY: Course I didn't tell them.

How would I even know their number?

She rang me from their landline.

You could have looked on my mobile.

Why would I do that?

I don't know, Tony, you tell me.

I'm worried you're getting sick again.

I'm not getting sick again, Tony!

Just 'cause I don't see the world exactly how you see it and how Elise sees it... What's Elise got to do with it?

Oh, every time I disagree with either of you, I'm going nuts again, and I saw you, by the way, exchanging looks about me at Mum's...

I didn't exchange any looks with her.

You have no idea what it's like being part of that family.

I didn't ring Zoe's parents, sweetheart.

I would never do something like that.

Marion.

Marion, don't... (door closes firmly) CASSIE: So yesterday we spoke to Tessa Nixon, or DI Tessa Nixon, I should say, and we both felt that she was holding stuff back, but no evidence as yet that she had anything to do with his murder.

Murray, what did the original investigation conclude?

Exactly that-- there was no evidence connecting her to any foul play.

How comprehensive were the files?

Pretty good.

Though we both thought their angle was definitely more misper than foul play, so...

There are holes, though-- things dealt with not quite rigorously enough.

Such as?

This travel card was found in an office desk of his in the days after his disappearance.

Okay.

MURRAY: Look at the dates.

Seventh of May 1990.

The day before he disappeared.

Are we, are we sure that this is his handwriting?

The experts back in the day thought it probably was.

And this was followed up?

Yeah, it was-- 26 Raglan Way, Highgate.

Uh, two sisters lived in there, both in their 70s, who had no idea why their address was on that ticket.

Got a number for the address, called it, but they both died several years ago.

Oh.

And I'm just wondering... That definitely a six?

Or could it be a zero?

CASSIE: I told you we shouldn't sack him.... (laughing) So have you made contact with number 20?

Yeah, local authority records have a Mrs. J. Dunphy living there, who's an 80-year-old widow.

Very good work.

We need to follow up on that.

Anything else?

These are photocopies of the last three months of his desk diary, and this is a list of all the original points of action that came out of it.

Went through, highlighted any gaps, and this one seems to have slipped through the cracks.

There's a time, 7:30, on the ninth of March, then next to it, a name, Colin.

Then five days later, the 14th, a phone number, which BT said at the time was registered to a C. Osbourne.

C for Colin.

And this wasn't followed up?

Officers called on the address attached several times.

It was a flat near Tower Bridge.

Flat seven, Ferrier's Wharf.

No one was ever in, and then it was never followed up.

But seeing as though it was only a few weeks before he was murdered, we think it's worth chasing down, right?

Yeah, definitely.

Thanks, Jake-- Fran?

Yeah.

So BT have been very helpful, lots of numbers come up more than once.

So most of these are his work numbers-- his clubs, his accountant, his office.

But this one here is his best mate, James Gregory, a restaurant owner.

He's still on the same number.

I spoke to him, he seemed really keen to talk to us.

That's interesting.

Okay, and finally... (clears throat): Anyone claiming a bottle of the very finest five-pound Prosecco?

Yes.

I think it's an address.

(detectives murmuring) (pulls cap off marker) Flat C. Shawbrook Mansions.

And the KX?

King's Cross!

(all murmur with realization) (applause) Very well done.

Good, Fran.

Very good.

Okay, now we will follow up on all of that.

Thank you, everyone.

♪ ♪ CASSIE: Flat 7, Ferrier's Wharf, Tower Bridge.

Yes.

August '88 to May 1990, it was let to a Colin Elliot Osbourne.

Okay, any forwarding address?

No.

Right, no references or previous addresses?

Sorry, after seven years, we just keep the contracts.

Right.

Wow.

24,000 per annum, that's... what?

That's two grand a month.

That was serious money back then, wasn't it?

It was the '80s-- it was when serious money was invented.

Yeah.

Fran, I'm in King's Cross, outside your Shawbrook Mansions.

Can see it was residential.

It's now an advertising agency.

(men talking softly) Maybe check land registry records for 1990, see who owned the building, check utility bills-- gas, electric, water... Yeah.

SUNNY (on phone): Yeah, okay.

♪ ♪ (doorbell rings) ♪ ♪ (cell phone chimes) CASSIE: Hey.

SUNNY (on phone): So?

A zero or a six?

Don't know yet, no one in.

I dropped a note through the door to call us.

So I've just spoken to the original owner of the King's Cross property.

Be happy to speak to us in an hour.

Huh.

SUNNY: Fran found a gas bill with the tenant's name-- an S. Alazi.

Also, just spoke to Jake.

He thinks he might have tracked down your Tower Bridge tenant-- a Colin Elliot Osbourne, who's the right age-- living in Brighton, working as a lawyer.

Great.

(waves lapping, gulls calling) COLIN (on phone): I'm gonna give you the money.

All right.

COLIN: But it's a one-off payment.

If you come after me again, I will go to the police and social services myself and I'll take my chances.

I need to know you understand that.

TYLER: Absolutely.

You know, I'm not some low-life blackmailer, Colin.

This is a one-off-- for both our benefit.

Meet me in the cafe we were in before at 9:30 on Wednesday.

(phone beeps) ♪ ♪ SWEET: Miss Alazi.

SUNNY: Miss.

SWEET: I'm sorry, no.

I have no recollection of her at all.

I mean, obviously, she was a tenant, because she paid the gas bill, but I owned eight houses, each of which had up to five flats, you know?

Which I rented out from the late '60s to when I sold up in, uh, was it-- 2007.

Yeah, I must have had thousands of tenants.

Right, I see.

Took over the supply in late '89... Well, as I'm sure you're both well aware, King's Cross has changed a fair bit in the past few years.

SUNNY: Yes.

But in '89, the house she lived in at that time, I rented it out almost exclusively to prostitutes.

Yeah, lovely girls most of 'em, mm-hmm.

Yeah, very reliable-- always paid on time.

So I'd be very surprised if your Miss Alazi wasn't a tart.

♪ ♪ Any form relating to S. Alazi, King's Cross area, from, let's say, '88 to '92.

Cheers, Jake.

JAKE (on radio): Guv.

♪ ♪ I'm trying to think of other reasons why a man would have a prostitute's address sent to his pager, but I am struggling.

Which would be exactly the same conversation a wife would have with her husband if she found out.

Indeed.

♪ ♪ (phone ringing) ♪ ♪ We can use this one.

(door latches) CASSIE: I'm sorry, we're very aware of how hard this must be for you to hear.

And he messaged her or...?

We think she sent him her address.

Which we have good reason to believe she used for business.

No, I had no knowledge of him using prostitutes, obviously.

I was his wife.

And, no, we didn't row about it, the row didn't get out of hand, and I didn't accidentally kill him.

Sure, but knowing him as you did, and notwithstanding his... issues, is it something now you could contemplate he could have done?

Could he have been that sort of man?

How long have you been a detective, DCI Stuart?

22 years.

19.

Would anything a man is capable of surprise you?

Okay.

Thanks for your time, Tessa.

Thank you.

SUNNY: Thank you.

Bye.

(door opens) ♪ ♪ (people talking quietly) ♪ ♪ Mr. Osbourne.

Excuse me-- hello.

DCI Stuart, DI Khan, Bishop Street Police.

Is there somewhere we could go for a quick chat, please?

Sorry.

No, no idea.

SUNNY: And the name doesn't ring any bells?

Um, no, no, sorry.

Okay, not a problem.

Um...

The only reason we ask is that we found a phone number that was registered to a flat that you were renting in a desk diary belonging to David Walker.

Which flat?

Uh... Ferrier's Wharf, Tower Bridge.

Oh, okay.

You did rent that flat?

Uh, yes.

Late '80s, I think.

'88 to '90.

Um... We had a lot of mates staying with me at that flat.

I suppose any one of them could have given this guy the number.

It was slightly party central.

CASSIE: It was a pretty cool flat?

Well, I was working in the city at the time, so... As a lawyer?

No, uh, banker, I'm afraid.

Oh, right, um...

Which bank?

Klein Edgerton.

Banker to criminal lawyer, that's... That's quite a change, isn't it?

Is it?

What prompted that?

If you'd worked in the city in the '80s, you wouldn't have to ask.

It was pretty soulless.

Well, good for you.

I looked at your chambers' website.

You do a lot of really good work.

Oh, I hope so.

Lots of pro bono.

Yeah.

You obviously have a desire to... Give something back.

Well, if you, if you can, I think you should.

CASSIE: Hmm.

Yeah.

Well, thanks for your time.

Mr. Osbourne.

We appreciate it.

I'm sorry I couldn't be more help.

Oh, actually, no, there's one more thing.

When did you say you left banking?

I'm not sure I did.

Um, early 1990.

Right.

So... February or-or March, or... Um...

Yes, around about then.

I'm sorry I can't quite remember exactly.

No, no problem.

Thanks again.

You're welcome, thank you.

Bye.

Cheerio.

Cheers.

♪ ♪ Subtle.

Aren't I?

You might as well have just said, "Guilty conscience, Mr.

Osbourne?"

Yeah, got him sweating, though, didn't it?

And I'd put money on him knowing David Walker.

♪ ♪ DOCTOR: For some women, it only lasts a few months, whereas for others, it can take... All I want to know is, am I still fertile?

Well...

Given your age and the fact that you haven't had a period for 18 months, it's pretty unlikely.

(exhales softly) I mean, I could still get you referred to a fertility... No, no, it's not a problem, really.

It's not a problem at all.

Thank you.

COLIN: He said he hoped she'd die of AIDS.

I just...

I mean, I just thought your temper issues were so in the past now.

And they are.

Right, so you risk your job.

You force us into engaging with some incredibly unstable couple, you jeopardize everything because someone takes a shot at us?

I'm sorry.

It's all right, it's okay.

God, I've completely messed up, haven't I?

No, you haven't.

We'll deal with it, okay?

We'll... We'll work it out.

Okay, so I think we've got two options.

We tell Janet.

No.

Colin, you know the rules.

If any of our circumstances change, we have a duty to tell her and make sure... And how do you think that's going to play?

How happy are they gonna be to leave an already very vulnerable young girl with somebody who loses their temper like that?

Which is, I'm sure, exactly what you're thinking right now.

Of course I'm not.

If we tell Janet, we could lose Flo.

Okay, well... Then the second option is we give them the money.

I think it's our only choice, love.

I just hope it's enough.

♪ ♪ (door closing) ♪ ♪ (birds chirping) ♪ ♪ (sobbing) ♪ ♪ PAUL: You okay?

Is there any way you could swap weekends with Melanie so Becca could go there this weekend?

Uh, yeah.

Yeah, fine.

What?

No, it's just... Becca's mum's very noisy, with her step-brothers.

She has her exams next week, so... Oh, right.

She's really hoping to be able to revise here in a bit of peace and quiet.

Fine.

I just...

I do need some space, love.

I'm-I'm finding this all pretty hard.

Yeah, of course.

Well...

I'll speak to her.

Okay.

Thank you.

Anything, um...

Anything I can help with?

You want to... Talk to me?

Tell me anything?

(sighs) Tell you what?

No, fine, it's just...

Anytime you need to... ...offload, I'm here.

Well, thank you.

♪ ♪ So we have four arrests for a Sara Alazi, all in '89 or '90, and all within a five-minute walk of the King's Cross flat.

Um, and on two of those occasions, she was arrested with the same woman, a Samira Khan, who is still a sex worker.

Impressive.

Uh, last arrest was 18 months ago for running a brothel just off the Pentonville Road.

Council tax records have her down as owning it although it is now listed as a spa.

Well, I don't suppose brothel's an option on the form.

Oh, one more thing.

David Walker was a Tory party fundraiser for most of the '80s.

Can you ring his wife and see if she has any photos of him from that time?

Photos of functions they went to, press clippings.

And if you get no joy there, ring the party HQ and see if they have a photo archive that we can look at.

Got it.

Thanks, Jake.

Got the address.

Shall we go?

♪ ♪ SAMIRA: Can I help you?

Hi, I'm DCI Cassie Stuart.

We're looking for Samira Khan.

Yeah, we were very good friends.

And over what period of time, would you say?

When we were working together.

Not long-- eight, nine months, maybe?

But we stayed friends after.

Right, and so when did she stop?

Sex work?

Yes.

Um, early 1990.

She cleaned herself up and moved out of London, but we just stayed in touch-- phone, letters-- and we'd meet up every few months in town for a coffee and a natter.

And when was the last time you saw her?

'93, '94, maybe?

But we wrote to each other until about, um, 1995.

And where was she then?

She was living in Salisbury.

She'd, uh, done a degree, I think, and got married.

Yeah.

She was always a smart girl, not like me.

Did you keep any of the letters, Samira?

Sorry, no.

That's no problem.

I know it's a long time ago, but do you happen to remember her married name?

Yeah, I do, because we joked about it in the letters.

Mahmoud.

Same as my mum's maiden name.

I said I always knew we'd be family.

(pen clicks) Thank you so much, Samira, you've been incredibly helpful.

It's no problem.

And if you do find her, send her all my love, will you?

I'm glad she got out.

She was always better than this.

♪ ♪ SARA: Sex, death, and revenge.

Here are three of our main topics.

♪ ♪ You all right, Miss?

Let's look at, um... act three, please, scene four.

♪ ♪ "Thanks to Your Majesty..." (knock at door, door opens) Mrs. Mahmoud, could we borrow you for a second, please?

No, sorry.

I don't recognize him, I'm afraid.

SUNNY: Okay, no problem.

Any idea how your flat address might have ended up in his pager?

Can I remember why I might have given some random bloke my address one night in the '90s?

No, sorry.

Well... Do you think there's a chance that you gave it when he was your client?

What do you mean, "client"?

A punter.

Of yours.

When you worked as a prostitute.

(inhales sharply) (crying): Please say you don't need to tell anyone this.

Here or my family.

Please.

(whispers): Please.

It was a lifetime ago.

I was a completely different person.

Sara...

If you cooperate with us...

I will completely.

I want to help you.

Then there's absolutely no reason why anyone but us needs to know about anything.

(sniffs) I don't know him, I swear.

But yeah.

Of course he could have been a client.

(sniffs) You had a lot of clients, I presume.

I did what I did for less than a year.

I was in a very dark place at the time.

(sniffs) But a year is still a very long time in that world.

(sniffs) When did he go missing?

May 1990.

The eighth, we think.

I was abroad.

(sniffs) I went traveling in Europe early 1990, and was away for most of the year.

You can check passport records.

I was a thousand miles away.

So what did you think?

Completely credible.

I agree.

But let's assume she's lying.

Absolutely.

I'll check the passport.

JASON: I've spent 26 years being messed up by something that never actually happened, Becs.

I mean, can you imagine what that feels like?

No.

Let me tell you-- you rage inside because of the years I've wasted.

(pounds wall) I never needed to become the useless loser that I am now.

I just...

I feel...

I feel I want to take it out on someone.

I want to punch and smash and hurt someone.

(door opens) Dad?

Hey?

Except there's no one to blame, and... Dad.

Jason?

Yeah, hi, Paul, hi, Mum.

Hiyah, sweetheart-- why didn't you tell us you were coming round?

Wasn't planned.

Just needed someone to talk to.

All right, it's okay.

Hey, it's all right.

Everything all right?

Mm-hmm.

It's fine, it's fine-- come on.

Thanks, thank you very much.

Bye.

Guv.

Yeah.

I've just spoken to the friend again-- James Gregory, the restaurant owner.

Okay.

So the conversation was pretty brief-- he was on the way to work, but, uh, he was telling me about David's problems, his depression, his drinking.

Tessa never told us about that.

He thought it had a lot to do with what happened to him as a kid.

Which was?

He said he'd been abused by a teacher at his primary school.

And in the last few months of his life, he talked a lot about going to the police, finally reporting what happened to him.

But, also, he talked about confronting his abuser.

And then one day he just disappears.

And then one day, someone sticks a knife in his chest.

♪ ♪ (click) CUMMING: Next time on "Masterpiece Mystery!"

CASSIE: All of them have had some sort of connection with David Walker in the months before he died.

I'm in trouble, Tony.

Have you told me everything, Col?

Never speak to anyone else about this.

I promise you, I knew absolutely nothing about it.

CUMMING: "Unforgotten," next time on "Masterpiece Mystery!"

♪ ♪ Go to the "Masterpiece" website-- listen to our podcast, watch video, and more.

To order this program on Blu-Ray or DVD, visit shopPBS.org or call us at 1-800-PLAY-PBS.