Inspector Lewis

Adam Capstone, Professor of Geometric Topology.

The bomb was made out of fulminating mercury.

Cheated on you?

Paula Guitteau, she was one of his students.

- She committed suicide. - I wish only bad things for Adam Capstone.

He made me promise not to tell anyone who the father was.

Then Elizabeth found out about the payments.

So Elizabeth knew? She wouldn't have any problem getting mercury.

And she'd know what to do with it.

They were letters -- nothing else. I wanted to make him hurt.

Mr Adomakoh is one of our brightest stars, all the way from New York.

There wouldn't have been a breakthrough if not for me.

If their research can make a difference when I'm gone...

- A legacy. - I'd do anything for Donald.

Always remember 060302.

Put it down. Very slowly.

Mummy!

Mummy!

Your daughter needs you.

Are you OK?

Getting there.

At least he's alive.

How are you doing?

- Superficial bruising. - Yeah, me too.

How's your hearing? Mine's rubbish.

It's like being underwater.

What?

I said how... Very funny.

Have you called Laura?

She's not picking up.

I left her a message. Oh, God.

What were you thinking?

Well, we didn't exactly have a plan, sir.

You should've retreated and let the bomb squad take over.

And to hell with David Capstone?

I don't like my men being blown up.

- I'm not a huge fan of it myself. - It's because he cares.

So what did they say about Capstone?

He'll live.

- He's lucky. - I think you all were.

Ow!

Well... I think um... I'll leave you guys to get on with it.

What was that for?

For putting yourself in harm's way.

- And that one's for the message you left. - What was wrong with it?

"I'm OK, it was only a small bomb"?

Well, it WAS only a small bomb.

Oh! Idiot.

Hey...

Listen...

.. I'm not gonna go to New Zealand.

But we're all set.

Yeah, I probably should've said something sooner but I...

I know it's a long way and it's my family and not yours...

- That's not it. - And the place'll be full of baby stuff...

I'm scared, Laura.

If I go now, I'm not sure there'll be anything for me when I come back.

Of course there will. Moody won't sack you when you're out of the country.

That's exactly what he might do. Anyway, he doesn't have to sack me.

I'm a consultant. All he has to do is not renew my contract.

Which will be very easy if I've been away for a while and people have forgotten I exist.

Well, what am I meant to do? Go on my own?

We planned this together, Robbie. It's a trip of a lifetime.

And it will be.

- This is ridiculous. You're being ridiculous. - What if I'm not?

No-one's gonna forget you, Robbie.

Yeah, I've seen it happen.

Would it be the end of the world if it did?

This... This is what I know.

This is who I am.

I tried being away.

I'm rubbish at it.

This is what I do.

It's what I want to do till the day they carry me out of here.

Like Morse?

Well, there are worse ways.

I'm sorry, love.

I know you are.

Sorry to disturb...

Go. Be brilliant.

Sorry, Lizzie. What were you saying?

Good news. We got lucky.

Part of the package that the bomb came in survived the blast.

We know where it was posted.

- 11:43 yesterday morning. - Is this the best we can do?

Afraid so.

We've got a time and place. Let's see where everybody was.

Starting with Frank Guitteau, our letter writer.

How could I send it? I was at work.

Not at 11:43, you weren't.

According to your boss, you were out alone all morning.

I had a pick-up, office furniture out near Marston. You can check.

We did. They confirmed you left at 10:15. You weren't at the depot until after midday.

Which gives you plenty of time to have posted that parcel.

Did David Capstone know Paula well?

I don't know.

I mean, she probably attended his lectures.

But she didn't go to any of his tutorial groups or anything.

And when she accused Adam of rape?

He stuck by his brother, of course.

Like everybody else, just when Paula needed some friends.

And you resented him for that, did you?

So I wanted to blow him up, is that right?

Did you?

Of course not.

When can I go home?

Kate?

- I've got a few questions for you. - Well, can't it wait?

Er... no. Not really. Inside?

OK.

Well, er... how can I help you?

I wondered if you would mind telling me where you were yesterday morning.

What, you asking me for an alibi or something?

Er... OK.

I was in a lecture until 10:30.

And then I worked on a problem with the 3-D printer.

Mr Adomakoh.

I've left you a message.

Er... yes. I was busy. Sorry.

I was just leaving.

I saw you earlier, didn't I?

Outside David Capstone's house.

Er... yes. I was running. My route took me past his house.

I was interested.

Where were you yesterday?

Why are you asking him that?

- At lectures. - All morning?

Professor Mowbray likes to take his time.

And did anybody see you?

I don't know. You'll have to ask.

Yeah. I will. Thank you.

And if I've got any more questions, then I know where to find you now, don't I?

Why try to kill both brothers?

Well, the first bomb was pretty clumsy.

There was no guarantee he'd get Adam. It could have just as easily blown up his secretary.

There was no danger of that with this morning's effort.

I phoned Elizabeth Capstone. She said Adam often didn't even go in to work until gone 11.

Left all the admin to David.

So you're saying that Adam was a mistake and that David was the intended target?

Well, two bombs in three days.

Someone wants whoever dead in a hurry.

- What? - Come on.

David Capstone's just about to cash in on years of research.

Apart from his brother, who else would hate to see it happen?

- The person who saw it as their legacy. - Mm.

He's having a bad day.

Oh, you're wasting your time and mine.

We think Adam was killed by accident and David was the bomber's intended target.

What's that got to do with me?

You'd invested all that money for the greater good.

And David's selling to the highest bidder.

When you thought you'd leave something worthwhile behind.

- Did you try and stop him? - Oh, sure.

I threw together a parcel bomb because dexterity is one of my strongest points.

I wrapped it up, put on a stamp, went into town and posted it.

You could've had help. Where were you yesterday morning?

No, leave her out of it. (Coughs)

It's OK. Er... I was out yesterday morning, running errands.

- What sort of errands? - That's enough! I want you to go now.

In a moment. Ms Alderwood?

To the bank and then the shops.

Will you leave! Out!

What was it you said? You'd do anything for him?

Can you think of anybody that would want to hurt you, Mr Capstone?

I'm assuming it was whoever sent those threatening letters.

Well, we believe those were directed at your brother.

Then, no. Sorry.

What about Kate McMurdoch?

Er... well, it's possible, I suppose.

I mean, I was the one who brought her in. I was her mentor.

I was the one who had to explain to her the um... realities.

Plus she had a sense of entitlement a mile wide.

Sorry, I...

It's been a long day.

Can we give you a lift home?

Or is there somewhere else you'd rather go?

No, no. I just want to go home.

Um... I would invite you in...

We need to be getting back.

Well, there is just one other thing.

You said you didn't know Paula Guitteau. Yet you marked some of her papers.

I marked one of her papers when Adam was away. But I didn't know her.

Er... that was at a Christmas party. I think the whole faculty were there.

I don't remember that, but then I was probably in 100 selfies that evening. Sorry.

Do the numbers 060302 mean anything to you?

Are they important?

We found them at Paula Guitteau's home.

A combination or something?

- Well, if you think of anything... - Yeah. Of course.

Er... Inspector?

You wait here.

He promised me money and then he went back on his word.

I knew where he kept it and I thought the house would be empty after what happened.

- Why did you need money? - I have debts.

What sort of debts?

Gambling.

I developed a taste. It's so easy.

You have no idea.

- David Capstone said he'd pay them off? - That's right.

We're a team, although the other players think that we're strangers. We play the casinos.