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They hang them from the walls,

it's why they call it Clifford's Tower.

Must be easier ways to get a building named after you.

That's what my father used to say when he brought me here.

You got around, you and your dad.

Yeah, well...

yeah, he wanted to show me the whole world.

So...

Thank you, Patience.

Wh... what... for what?

For distracting me.

I've been dreading going to pick up Alfie.

Thank you...

Detective Bea, for...

well, for making things easier.

That's what friends are for.

Speaking of friends, I'm having some drinks for my birthday

on Friday, just at the pub.

You might have other plans or may not fancy it, but...

it'd be lovely to celebrate with you.

Well, you're gonna be late for Alfie, so...

Yeah.

I'd better go.

How was it?

Boring.

Can you tell me about it?

Just a bunch of pictures on the computer.

Did you have to answer questions, pick A, B, or C,

that kind of thing?

Uh...

Yeah. - And?

How did it go? - I don't know.

Okay.

Sorry.

Mum?

Am I weird?

Weird?

Of course not.

But... is there something wrong with me?

No, bub.

You're perfect.

We're... we're just trying to work out

if your brain's wired a bit differently.

That's all.

Okay.

I went to someone's to play Warhammer,

but I had to leave.

Uh, his deodorant, it just smelt too strongly.

Yeah, I've... I've been there too, Theo.

Don't worry about that.

Um...

I've been invited to a birthday party.

Ooh.

For... adults, I presume?

Er, yes.

Yeah, I think so.

It's, um, Detective Bea's.

Brilliant.

Good for you.

There... there'll be alcohol.

I should hope so.

Loud music, lots of people.

Duh, it's a party.

No, not everyone likes the same things

when it comes to socializing, Maya.

Rather you than me, Patience.

Thanks.

So, what did Detective Bea say about the party?

Well, she said it'd be lovely to celebrate with me.

Yeah, I'm sure she meant it.

Okay, so you... you think I should go?

Wait, no, I mean, only you can decide that.

Yeah, but you... you said that we should be

open to new experiences, right?

Yeah. I mean, what's the worst that can happen?

Well, I don't know anybody, um, I won't fit in.

What if nobody talks to me?

What if I get her a present she doesn't like?

Where do I start?

Okay, er...

it can be tricky, buying presents for neurotypicals.

Oh.

Hold on, I've got two voice messages.

Okay.

It's from a WPC Carmichael.

A police constable, for you?

Why...?

She's asking to call urgently.

As Paul Thompson's next of kin.

Something happened to my brother.

So, um...

Mr. Waller, he's the mortician,

he said that Paul, my... brother,

Paul Thompson, said that...

he died of a heart attack and a circulatory collapse,

so...

There'll have to be an autopsy, Billy.

Nah, the pathologist broke his arm, so,

they're not sure when another one will be available.

They're gonna embalm him, my brother,

not the pathologist.

Here.

Thanks.

I've still got his clothes, they, um...

asked me to pick out his clothes.

He loved trains.

I...I can't... I can't go back in.

I'll do it.

I'll do it.

- What are you doing? - Er...

I'm looking for signs of circulatory collapse.

And you are?

Um, I'm a friend of Billy Thompson.

Well, you shouldn't be in here.

Well, I brought his clothes.

Mr. Thompson forgot to take the things

his brother was wearing.

They need a wash, I'm afraid.

Um... sorry, there were no signs of circulatory collapse, but...

Billy was told that that was a factor in his brother's death.

Well, to be honest, I wouldn't know.

- You're a mortician. - Administration and support.

Sorry I'm late.

Got your lunch?

Football boots?

Cupboard under the stairs. Quick.

You seen his test results?

Hmm. They're available?

Yeah, they said it'd be 12 hours.

Do you want me to summarize?

No. No, I'll...

I'll read them myself.

Alright.

Bye, Mum.

Bye.

Hey, he's... he's gonna be alright, you know?

Yeah, I know.

If you guys want to talk amongst yourselves or anything,

that's fine.

I'm just not really feeling in the right head space today.

I didn't even know your brother.

How... how can you even be here?

I'd feel worse at home on my own.

Sorry, everyone.

That might be Paul's fiancée,

she's...

er, she's er, working in France.

Billy, you should answer it.

Hello, is that Ophelia?

What do you mean, Paul's disappeared?

Thought I heard a car engine, I, um...

I...I ran out but there was no vehicle.

Was anyone else in the building?

No one.

It's usually just me and Frank,

or his assistant.

The pathologist, Dr. Di Marco,

he was supposed to be here yesterday

to conduct the post-mortem.

He broke his arm, didn't he?

So, Frank goes for a brew,

and then persons unknown grab the body

and make off with it?

That's what you think happened?

What other explanation could there be?

You'd already started the embalming process?

A...a few minutes before.

Ahead of the autopsy?

That's not uncommon.

We'd no idea when we'd be assigned another pathologist.

What chemicals do you use?

Um, my own formula.

Er... formaldehyde, naturally.

Strychnine, ethanol, activated charcoal,

and, um, this may surprise you...

cognac. - Frank!

Cheaper than anything you can buy off the shelf,

and it lasts longer.

Was the body drained of blood?

We do that at the same time.

Then, they hadn't lost much.

I'm just trying to establish if there's a possibility

that Paul Thompson walked?

Good grief, no!

At the insertion stage,

the eyes and the mouth have been sewn up.

This must be very difficult for you.

Can I at least get the clothes I picked out for him

to be cremated in?

They're gone as well, Billy.

It's just Paul was the one who understood me.

He just made it easier to cope with things, you know.

He just told me to celebrate who I am.

I've not seen this one before.

It's my first puzzle.

My father would show me the whole shape,

and then remove pieces and ask me

to put it back together again.

So, you need to work from the top.

So, you need to make sure that our finger's here,

pull the bottom one out, then...

this one just slides out like this.

Think you can put that one back?

Backward induction.

You know, in chess it's known as retrograde analysis.

Yeah, it somehow made it easier to solve,

seeing the completed puzzle and...

and knowing that there was a solution.

Look at that.

It's all back together.

There you go.

Yeah, speaking of puzzles,

have you decided whether or not

to attend DI Metcalf's party

or what gift to get her?

I just know it needs to communicate what you feel

about the person.

Oh, I'll get it.

Billy.

What... what are you doing here?

Hi. Um...

I er... I can't get it out my head

that Paul might still be alive.

Well, I know, I know, it sounds bonkers, but...

when... when I was young, we used to...

have this Bible, and...

there was this drawing of Lazarus.

And he was climbing out the tomb,

and I just... I just keep on imagining Paul

doing the exact same thing.

He was pronounced dead, Billy.

I know. I know. I...I keep telling myself that.

I'm clutching at straws. But...

Look, will you just come with me... to his flat?

Please, just to put my mind at rest.

N...

Please.

Patience.

Alright, you're the most rational person I know.

Paul?

Billy, is it usually this untidy?

No, Paul's very orderly, very neat.

Oh, God, Patience!

- What? - Patience is that him?

Is that him?

No, no, no. No, Billy, that's not your brother.

Billy, he's alive!

He's alive, whoever he is.

We have to call an ambulance.

It's the tie I took to the mortuary.

It... it suggests that Paul was here,

um, so, wait, er...

...um, so, er, er, Paul was... was... was alive

and now he's dead, and then he... and then... and then...

and then he was alive again,

and now he's killed someone.

No, no, no, no, he's not dead.

- Who's not dead? - The man in the kitchen.

Billy, Billy, just listen to me.

We have no way of knowing who stabbed that man.

But what we do know is that Paul's tie

was used to save his life.

Just er...

don't, um, tell the police

that I took the tie to the mortuary.

- I... - At least until we know

Paul's alive. - Billy.

I...

I...

Patience, please.

Please.

Is that the victim's?

We think so.

Thank you.

Sacha Davidson, Exec Assistant AFT.

What's AFT?

Let's find out.

It's a food processing company.

And your brother worked there, you say, in research?

Yes, he collapsed there too, at a party, so I've been told.

What kind of party?

Um, celebratory drinks.

They'd won a case at the High Court.

I think I read something about that.

Was it something to do with additives?

Yes, some families claim that colorants and sweeteners

that AFT added to certain food groups for children

are linked to behavioral issues, so...

And what were you doing here, Billy,

you and Patience, at Paul's flat?

Well...

Billy thinks that his brother may still be alive.

But you...

you heard them in the mortuary,

they stitched his eyes and lips shut.

Jake.

Why would anybody steal a body from a mortuary?

To cover up the cause of death.

You said Thompson died of a heart attack.

Well, that's what the paramedic said, Sir.

- And you think it's suspicious? - Well, we don't know.

The autopsy was supposed to happen yesterday,

but the pathologist broke his arm.

Which now seems a bit coincidental.

The pathologist, Dr. Di Marco.

Uh, Charlie Di Marco?

- Yes, Sir, do you know him? - Uh, yeah,

we go to the Rotary Club together.

Mm. Well, we...

we checked out his social media, Sir,

his daughter, Anita, she's Head of Investor Relations at AFT,

the company where Paul Thompson and Sacha Davidson worked.

Davidson, the guy who got stabbed?

That's correct, Sir.

What are you implying?

That maybe someone at AFT was relying on Di Marco

to carry out the autopsy.

What, to fake the findings, you mean?

And when he wasn't available, they had to stop the autopsy

from going ahead by other means.

And where does Davidson fit in?

He knew too much. Had to be silenced.

Ugh, did I mention I've got a headache?

Sorry, Sir.

How would you like us to proceed?

Hmm.

Don't approach AFT until I've talked to Charlie Di Marco.

Oh, Ma'am, um, that's everything I could find on AFT.

A quick headline would be good.

Collective action, Ma'am, brought by three families.

On behalf of many more?

That's right, more than 600 of them.

They reckon AFT would have had to pay

up to three hundred million in damages had they lost.

But they didn't.

Case not proven.

The families claim that AFT continued to use

certain additives in their food products,

despite being aware of a suspected link

to behavioral issues in children.

But the judge was satisfied that they'd taken reasonable steps

to make their food products safe

once they were made aware.

What kind of behavioral issues?

Er, hyperactivity, attention problems, I think.

It's all in file, Ma'am.

- Thank you. - Yeah.

How was it?

- Awkward. - Mm.

What did he say?

"For those bastards, are you effing kidding me?"

Words to that effect.

But his daughter's on the board.

Not for much longer, maybe.

Di Marco said he's been urging her to leave.

What's stopping her?

A stock exchange listing next month.

Well, I'm sorry, Sir, if I've compromised

a friendship for you.

Well, we won't be playing foursomes

at the next golf day, but, er, it was worth it.

Di Marco was so keen to prove he's not in the AFT's pocket,

he sent me a video his daughter had shared with him.

It was taken during the drinks party AFT held

after the court ruled in their favor.

Er, he says,

"This is the work event

at which Paul Thompson died."

This was a team effort,

and together we did it. So congratulations,

let's have a drink, enjoy yourselves.

Yeah. We had nibbles. Some drinks.

So what?

There was enough bubbly to fill a bath.

And your point is...?

As CEO, wasn't this in bad taste,

given the difficulties those families

and their children have experienced?

The future of AFT rested on that case.

My team had worked on it for months.

I think a bit of relief, happiness, even,

at the outcome is forgivable.

Hm.

Paul Thompson doesn't seem very happy.

Perhaps he'd started to feel unwell.

This was taken at 12:43 p.m.

Paul didn't collapse till after 3:00.

A colleague of mine is lying in an induced coma,

after being stabbed multiple times,

isn't that what you should be investigating?

Sacha Davidson was at this party.

We believe the attack on him may be linked to Paul's death.

What a snake pit.

A rabbit warren, you mean.

They're all shagging each other. - Who is?

Well, Paul Thompson for starters.

- With Sacha Davidson? - Nope.

Anita Di Marco.

The pathologist's daughter?

The very same.

When Paul broke it off,

she was caught on CCTV

running her key down the side of his Audi

in the staff car park.

She only kept her job because he declined to press charges.

You've got more?

The CEO,

Mrs. 'And-Your-Point-is?'

- With who? - The executive chef.

They have their own chef?

Crazy, innit?

Mason Jenner.

Will ran his name in the PNC,

he was caught with his hands in the till

at some fancy restaurant. Served two years.

Explains why he's making sandwiches for the board at AFT.

- Good work, Jake. - Mm.

I said Patience could wait in your office, boss.

She seemed upset.

Patience, you alright?

I...um...

I'm sorry, I just... I should've told you.

- Told me what? - I...I didn't...

I didn't want to betray our friendship,

but by avoiding doing so, I would've betrayed

my friendship with Billy instead and...

Patience, it's... it's alright.

Tell me what?

The tie that was used as a tourniquet on Sacha Davidson...

Yellow with red trains, right?

Yeah.

It was the same tie that Billy brought to the mortuary

for his brother to wear.

What, a similar tie?

Identical.

I think...

I think Billy's right.

I think Paul's alive,

and he stabbed Sacha Davidson.

His eyes and lips were sewn shut.

And blood clot analysis

suggests that Davidson was stabbed

several hours before you found him,

while... Paul Thompson's body was still in the mortuary.

Yeah, but that assumes that the information given to us

by the embalmer, Frank Lawrie, is correct.

And I don't believe him to be a reliable witness.

What makes you say that?

I'm... I'm sensitive to smells, DS Hunter.

And the aroma of cognac was far more powerful on him

than in the embalming fluid.

We'll try again tomorrow.

Come on.

When hell is full, the dead still walk the earth.

Aaaarrr!

Aaarr!

I've been... trying to work up the courage to tell the truth.

Which is what?

Paul Thompson...

disappeared from the mortuary at...

2:30 a.m.

Not 7:00.

I also wasn't...

truthful about the car.

I heard footsteps.

I think he walked.

With his eyes stitched shut?

My hands were shaking too much

to sew anything up.

Why lie about it?

I needed time to sober up.

What, and you believe him? A hopeless drunk?

If he's unreliable then

we should also discount his first statement.

It... it doesn't matter which we choose to believe.

Either way, it doesn't prove that Paul Thompson is alive,

or that he stabbed Sacha Davidson.

But what about the knife we found in the dishwasher, Sir?

The fingerprints matched those found elsewhere in the property.

Because they're Paul Thompson's, it's his flat, his knife.

DS Hunter managed to speak to the fiancée, Sir,

Ophelia Lawrence,

to follow up on what Patience told us.

And she said Paul Thompson was convinced

that AFT would lose the case.

When they won, he called her from the party,

said it was a victory built on lies,

claimed he could prove it.

Uh, Paul worked in research at AFT,

perhaps something came across his desk

that would've damaged the case in court and...

and he kept a copy of it.

Is that what Davidson was doing in his flat,

looking for stolen research?

Maybe Paul mentioned his misgivings to the wrong person

and they worry it's gonna cost them 300 million in damages.

Yeah, not to mention the millions

the execs stand to lose personally

if the stock exchange listing has to be pulled.

If Paul Thompson is dead, then...

maybe he was killed to stop him talking.

Can we prove this?

Any of it?

It's pretty circumstantial.

See, that's Anita Di Marco.

And there, Sir,

we think that might be Paul Thompson's glass,

she could be putting something in it.

It's not circumstantial.

It's non-existent.

But Anita di Marco had been jilted by Paul Thompson,

she was angry enough to damage his car.

She'd been disciplined, Sir,

was maybe in danger of dismissal,

with the threat of the losing out on the float

and very lucrative share options.

Perhaps it wouldn't take too much to persuade her

they'd all be better off with Paul out of the way.

Ha, no, no. No, no, no, no, no.

This is not happening.

I'm not going on another fishing trip

with someone called Di Marco.

Bring me some real evidence.

I don't know, a USB stick.

A glass with traces of cyanide.

A body that, God forbid, can undergo an actual autopsy.

Um, can you play that video again, please?

Er...

The Chief's asking if we should put out a statement

about Paul Thompson.

Missing person or missing body?

She hasn't made up her mind.

Can you ask her to hold off?

Buy us more time?

I'll try.

But it's her call.

Look, she's nervous that Paul Thompson might be on the run

and desperate.

And if we haven't warned the public

and he stabs somebody else,

well, that's got an IPCC referral written all over it.

And if he's dead?

Well, frankly, we need another lead.

An appeal for information.

Somebody must've seen something.

Ask me what backward induction is,

Detective Inspector Metcalf.

Gonna start with hello?

No. I'd prefer you ask me what backward induction is.

What's backward induction?

So, it's a strategy used to solve problems

when crucial parts of the information are missing.

So, you start with a possible answer,

and then you work backwards.

So, let's assume that Paul Thompson

did walk out of that mortuary.

The paramedics arrived on the scene,

and declared him dead at 3:14 p.m.

He was taken to the mortuary.

He arrived at the mortuary and then he disappeared.

So, what is the one thing that we are certain of happening

between the times of him arriving

and him leaving the mortuary?

Well, he was fed embalming fluid.

Yes, exactly.

So, if Paul Thompson walked out alive, what revived him?

Okay, well, I looked into the embalming fluids

and the ingredients, and the most intriguing

was activated charcoal.

Just ask me why.

Why?

Because there are numerous cases of people surviving

tetrodotoxin poisoning

after being administered activated charcoal.

Often hours after the toxin entered their bloodstream.

Look... wait, you're gonna have to repeat that.

Tetrodotoxin.

It's produced in the liver of pufferfish,

it's known as, um, fugu in Japan.

Um, it's perfectly safe to eat, if prepared correctly.

But if not, it can be deadly.

It causes muscle paralysis

and blocks neurotransmissions, and in some cases

mimics the effect of death in its victims.

So, you're saying Paul ate this fish,

and the effects made it seem as if he'd died?

But the... the charcoal in the embalming fluid revived him?

Exactly.

What makes you think he had fugu?

Well, they were serving bento boxes at the party,

and Paul loves sashimi.

Can we prove any of this?

How did they know he would eat it?

Paul worked at AFT for 15 years.

They knew just what to order.

Traces of tetrodotoxin

w ere detected in one of the empty food containers

found in the bins outside AFT, Mason.

Any idea how they got there?

No comment.

You know what fugu is, I take it?

Perhaps your CV can answer that.

Two years training in Kyoto to be a sashimi chef,

followed by four more

at a variety of restaurants in Tokyo.

And then four more back here at one of London's top venues

for Asian fusion cuisine,

specializing in fish and seafood.

We spoke to the restaurant where you placed the order

for the bento boxes, Mason,

Sushi Okinomi.

They say that fugu's banned for public sale in the UK,

they would never serve it.

Is there a question coming, Inspector?

I'll ask you again, Mason.

Do you have any idea how traces of fugu

got in to the bento boxes you served at the party?

Perhaps the chefs at Sushi Okinomi

ordered kawahagi but were sent fugu by mistake.

They have a similar texture.

Or perhaps you acquired it from the only specialist dining club

in the UK that has a license to sell it.

They insist their clientele is expat Japanese,

but I reckon they might have one or two local customers.

It shouldn't be too long before their lawyers

process our request for access to their distribution list.

Again, Detective...

a question.

Are you in a sexual relationship with AFT's CEO, Bethan Porter?

No comment.

Were you aware that Paul Thompson

was in possession of research

that could've jeopardized AFT's successful defense

of a £300 million court case? - No comment.

Did Bethan Porter offer you money as an inducement

to murder Paul Thompson by feeding him poisoned fish

to prevent him revealing what he knew?

- No comment. - Did you murder...

Hold it there!

City of York Police have issued an advisory,

warning the public not to approach Paul Thompson

who is wanted on suspicion of attempted murder.

You've accused my client of murdering someone

you know to be alive.

We're leaving.

Billy?

I um...

I went for a bike ride to clear my head,

and it was like this when I came back.

Must've been...

keeping the flat under surveillance

and broke in when they saw a chance.

Is every room the same?

Yep.

Yeah, they went through everything.

I mean, even the back issues of my bike magazines

have been ripped to shreds.

Well, so, did they find it?

Did... did they find what?

Did they find whatever it is

your brother entrusted to you, Billy?

Paul hasn't given me anything.

Patience, I swear.

On my life.

Paul is alive, isn't he?

And you know where he is.

Listen, Billy... he is in danger.

If he knows something that might reverse the court case,

then they're not just gonna let him be,

there is... there's too much riding on it.

We...

we need to try and persuade him

to hand himself in to the police

and tell them that the stabbing was an accident.

Will you...

will you come and show me where he's hiding?

Help me talk to him.

I should stay and tidy.

Then tell me where he is.

Paul?

Paul, are you in here?

Uh, I, I...I'm Patience Evans.

Uh, I...I'm a friend of Billy's.

He told me to mention the girl with the two umbrellas.

Paul?

Paul, are you in there?

It's okay. It's okay.

Um, nobody else knows that you're here.

Um, I, I...I've come to try and...

persuade you to hand yourself in.

To go to jail, you mean?

No.

No, no, no, I, I'm sure it won't come to that,

and... and Billy agrees with me.

Uh-huh.

Why would I put my faith in him?

He didn't even bring me socks.

Look, look Paul, you're in danger.

Too right you are.

Keep your hands where I can see them.

Where is it?

Where's what?

Ugh!

Where is the memory stick?

I swear, I...I haven't got it. - Then who has?

I don't... I don't know.

Turn out your pockets.

I'm gonna count down from five.

And then I'm gonna put a bullet in your knee.

Please, I don't have it.

Actually, scratch that.

I'm gonna put a bullet in her knee instead.

What?

Five... four.

How can I give you what I don't have?

- Three. - No!

- Two. - Stop, please, just...

One.

Aaargh!

Aargh!

I've just had DS Hunter on the phone,

says Davison's finally cracked.

Has he implicated the CEO woman?

Yeah, and exonerated Thompson,

he admits he was in the flat, looking for the research

under Bethan Porter's explicit instructions,

says Paul stumbled across him in the dark,

stabbed him in a panic.

Is Davidson in on the poison plot?

I don't think so, Sir,

but we're close to nailing Jenner.

The private dining club finally coughed up its client list.

They admit they sent a consignment of fugu

to a PO box in York last week.

You think he'll give us Bethan Porter?

To claim he was coerced, yeah.

Good work.

Oh, and, uh, Detective, happy birthday.

Are you... going to the drinks?

I wish I'd known.

Why?

I would've tried to change my shift.

Okay.

Uh, maybe we could grab a coffee sometime.

I...I don't drink coffee, the roasting process produces...

I'm asking you on a date, Miss Evans.

You do go on dates, don't you?

I...um...

I don't know, I'll...

I'll have to think about it.

Just...

Patience!

- You came. - Elliot Scott

just asked me on a date.

And...?

Well, I told him I needed to think about it.

You look like you could use a drink.

Yeah, can I have a still water, please?

Will, can you grab a still water for Patience?

Shift up, Jake. - Okay.

Do you wanna...

do you wanna take those off?

No.

Oh, I...happy birthday.

Thank you.

Gorgeous wrapping.

What?

I mean, that, for you.

It's lovely.

You alright?

Oh, sorry, um...

um, oh... I'm just... I've got to go.

Patience?

Patience?

Get... don't touch me!

Sorry. Sorry, just don't leave like this.

- No, I...it was a bad idea. - I realize that.

- Yeah, I've ruined your party. - No, no, no.

You've made my night by showing up.

And... and giving me this.

I get it, it protects you.

It eases your worries about getting hurt.

You know, you make things go easier for me as well.

I'm gonna be late for my bus.