- 2 years ago
While Benison College is being renovated, the desiccated body of a student who disappeared 15 years earlier is found in an attic and linked to Seager's murder.
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00:00Deceased is a professor Richard Seager.
00:02He was released from prison yesterday after serving a year for causing death by dangerous driving.
00:06Did you snap?
00:07I didn't hurt him.
00:09He killed my daughter.
00:10She thinks I killed him, doesn't she?
00:12Well, you know what?
00:13I wish I had.
00:14I'm told you're the master here,
00:16and I was hoping you could give me some information about his academic life.
00:19You were promoted to his chair of chemistry.
00:22Only thing I stood to gain from his death.
00:23What about this 500?
00:25The thing he scratched into the paintwork.
00:27But one of the hairs taken from the driver's headrest
00:29had DNA that's an exact match for Rachel Cliff.
00:31What? You're arresting her?
00:33You can't. You can't arrest her.
00:39What's wrong with this paint up here?
00:41Maybe it wasn't a number.
00:42It was a name.
00:57It's not what it seems.
00:58It's not what it seems.
01:00I don't know what to do.
01:02I don't know what to do.
01:03I don't know what to do.
01:14Time of death, Doctor?
01:16I heard you're going to need a forensic anthropologist on this one, Robbie.
01:18All I can say for certain is it's an adult female.
01:21Multiple fractures, including the skull.
01:23So a fall, beating with a blunt object, maybe?
01:27Any idea at all how long she's been up here?
01:29A decade or more.
01:31Really not my area, I'm afraid.
01:34I prefer a bit more flesh on my bones.
01:36Sir.
01:40What?
01:43Office ran a check.
01:44There's a record of a Sue Min Chon,
01:46who disappeared in June 1998, aged 20.
01:49She was an exchange student from South Korea,
01:51studying chemistry at Bennison College.
01:53So she'd have been taught by Professor Segan?
01:55Just finished a year assisting his research group.
01:57Booked a flight home, never turned up.
01:59Must be her.
02:04That wasn't easy, dragging her up that far.
02:07Do we assume she was killed here?
02:09Well, I don't think we can assume anything.
02:12I can't imagine you could move a body through the college
02:14without somebody seeing.
02:16Laura reckons it was a fall or a beating.
02:20What?
02:22Does that clean off?
02:39Right, where were we?
02:43Tell us again where you were in the early hours of Tuesday morning.
02:46In my boyfriend's room in Bennison College, all night.
02:49And have you ever been in his room?
02:51Have you ever been inside Professor Segan's car?
02:53No.
02:54If you're not going to arrest me,
02:55why do you keep asking me the same questions?
02:58You're free to leave at any time.
03:00But I'd like you to stay and help.
03:03In particular, I'd like you to explain how a hair
03:07found on the driver's headrest of the car that killed Professor Segan
03:11is a perfect match for your DNA.
03:14It must be her. Martha must have put it there.
03:18The only reason we're able to get this DNA from the hair at all
03:22is because it still had the follicle attached.
03:26Are you saying that Reverend Segan's been pulling your hair out?
03:29No. I don't know.
03:34That's not her, is it?
03:36Isn't it?
03:38No, she's 18.
03:39I don't know.
03:41Isn't it?
03:42No, she's 18.
03:44She'd have been in nursery school when Sue Min was killed.
03:47We can't assume a connection.
03:49Professor Segan's death might have nothing to do
03:51with our skeleton in the attic.
03:53Well, he spent his dying moments writing Sue,
03:56and then the body of a girl called Sue Min
03:58turns up two days later.
04:00Well, if you're so sure there's a link,
04:02it makes sense for you to handle both investigations.
04:04Sue Min's missing persons report.
04:06Enjoy.
04:09It's all a bit convenient, though, isn't it?
04:12The hair in the car just happening to give us a nice DNA match.
04:18Of course, another alternative is that Rachel's hair ended up in the car
04:23because it came off someone else.
04:35Adam, please.
04:36Look, Adam, we can sort this out.
04:39Adam, please!
04:42According to the original investigation,
04:43Professor Segan was the last person to see Sue Min before she disappeared.
04:48Give us a look.
04:50In his statement, he said she came to his office in college
04:52on the 17th of June to get her exchange credit signed off.
04:55She stayed for 20 minutes and then left.
04:56That was the last time anyone saw her alive.
04:59Perhaps she never left his office.
05:01What's this?
05:02Statements from study mates and friends
05:05saying that she was quiet, super clever, musical.
05:08She was Martha's organ scholar in chapel, apparently.
05:10Hmm.
05:16And a statement from her ex-boyfriend, Carl Drew.
05:36Sue?
05:37I'll need the forensics to be sure, but we think it's her.
05:40We understand that you were close.
05:42Oh, I'm not sure about close, but we were...
05:48Oh, God.
05:49Excuse me.
05:53Yep.
05:55Good.
05:56When I started my doctorate here,
05:58there was a bit of a thing between the graduates.
06:00Yeah.
06:00A sort of tradition.
06:01Thank you.
06:02To see who can bed the most undergrads.
06:04You know what it's like.
06:06So I went for Sue.
06:09This was way before Stella and I got together,
06:10but she was Sue's lab supervisor
06:12and I was trying to get her attention.
06:14By having sex with her research assistant?
06:19It wasn't my finest hour, but it was 15 years ago.
06:24So what happened?
06:26It wasn't serious.
06:28And we said goodbye a few days before she was due to go home
06:32and that was the last time I saw her.
06:35Remind me where you were the night the professor was killed?
06:39In bed with my wife.
06:41I'm sorry, but what has the fact that I went out with Sue Ming
06:4415 years ago got to do with Seeger?
06:46Probably nothing.
06:48As I say, just building a picture.
06:51They're saying they're going to be in there for another 24 hours.
06:55He'd hate strangers going through his things.
07:00Do you know you're welcome to stay with us for as long as you like?
07:03You're welcome to stay with us for as long as you need to, aren't you?
07:05I know.
07:06You and Carl have been so kind.
07:09But I feel I want my own.
07:11Adam!
07:12What's wrong with you?
07:33It never ceases to amaze me how much a woman can get into one suitcase.
07:39You owe me a drink.
07:41In fact, several drinks.
07:44Number one, dental records from the other side of the world
07:47confirming this is indeed Soo Min Chong from the Itaewon district of Seoul.
07:52Number two, the initial report I was able to drag out of the forensic anthropologist.
07:57He believes the skeleton dates back to the late 90s
07:59and that he finds me unnecessarily pushy.
08:02Yeah, Laura, perhaps...
08:03And number three, a luminal test showed a tiny stain on the suitcase was dried blood.
08:12The DNA was pretty degraded, but there was enough for a reasonable comparison.
08:16And it's a match for Professor Seeger.
08:20Seeger's blood is on Soo Min's suitcase?
08:23Here, under the handle.
08:27I knew there had to be a connection.
08:29Where's Hathaway?
08:31We should ask the Reverend Martha if she can shed any light
08:34on what was going on between Soo Min and her husband.
08:38How much longer are you people going to be?
08:40Every hour you spend pulling our chapel apart is costing this college a fortune.
08:46It's the skeleton of a murdered girl in your attic.
08:49It'll take as long as it takes, I'm afraid.
08:51She was identified as a student here in the late 90s, Soo Min Chong.
08:54Hundreds of students pass through this college every year.
08:57I can't be expected to remember them all.
09:00Not even the ones that mysteriously vanish.
09:02There can't be too many of those, surely?
09:05You all right, Adam?
09:05No, you've got to stop harassing Rachel.
09:07She can't take it.
09:13This will take some time.
09:14You're not harassing her.
09:16You're trying to frighten her, saying her hair was in the car when it can't be.
09:18She's never been anywhere near it.
09:20How can you be so sure?
09:21Because she's not a liar.
09:22Because she was with me all night.
09:23Asleep?
09:23Yeah.
09:24Well, then how can you be certain she was with you the entire night?
09:26I just am.
09:28I'm worried, Adam.
09:29I'm worried there's something you're not telling me.
09:30Well, there isn't.
09:31Because if your theory is right and your girlfriend's never been near that car,
09:34then we have to ask ourselves how her hair got onto the driver's seat.
09:38One answer to that question is that it came in on your clothes because you were the driver.
09:44You don't know what it's like.
09:45What what's like?
09:46Not being good enough.
09:47Being surrounded by people who are.
09:49People who get it.
09:51I'm not meant to be here.
09:52I don't want to hear sob stories.
09:54I want to know what happened that night.
09:56I know Rachel didn't leave my room because we didn't go to sleep.
09:59She stayed up with me all night because I couldn't stop crying.
10:02Okay?
10:04I'm pathetic.
10:04Anyone confirm this?
10:05That I'm pathetic?
10:06Yeah, sure.
10:07Try my tutors, my parents, my lab partners.
10:09But you both remained in the room all night.
10:13Forget it.
10:27You said you were coming straight home.
10:28Where do you think you've been?
10:29No, I went for a walk.
10:33Leave that.
10:34It's Adam.
10:34It's always Adam.
10:35You can phone him back.
10:37Look, tell me what they said.
10:38They're having a go, that's all.
10:39See if I'll freak out.
10:41Mum, I'm telling you it's fine, okay?
10:52She was the organ scholar during my second year as chaplain here.
10:56Sweet little thing.
10:58I don't think Richard ever mentioned her, though.
11:01Not at all?
11:04I'm not sure I even knew she was a chemist.
11:07Your husband said you supervised Suman's lab work for a while.
11:10Was that part of Professor Seager's Alzheimer's research?
11:13Yes.
11:14Well, she worked for a few of us in the group.
11:16Vaguely competently, as I remember.
11:18That good?
11:19Well, she wasn't exceptional.
11:22According to the missing persons report,
11:23she seems to have been extremely clever.
11:26Well, it's Oxford, Inspector.
11:28Everyone's extremely clever.
11:30And there's no way your opinion could be tainted by the fact
11:33that she was sleeping with Carl?
11:36Of course not.
11:38We weren't together.
11:43Apologies for having to ask you this, Reverend.
11:46But is there any possibility that your husband
11:48was having an affair during Suman's time in Oxford?
11:51That's absurd.
11:52Look, I'm sorry, but you said this girl had been dead for years.
11:56My husband was murdered two days ago.
11:59Why aren't you doing anything about that?
12:01We are, I promise.
12:04We believe he might have tried to communicate her name as he died.
12:09What do you mean, communicate?
12:11I can't say any more at the moment.
12:14Do you have any idea why he might have wanted people
12:17to make a connection between himself and Suman?
12:20He wouldn't.
12:22He hardly knew her.
12:24She was so important to him, he used his dying breath
12:27to write her name, yet never even mentioned her at all.
12:30Sounds like an affair, if you ask me.
12:35You lost something?
12:36Yeah, my phone.
12:37Must have left it at the school.
12:39What was it, Stella and Seeger were searching again?
12:42Oh, sorry, man.
12:44You're funny.
12:53So long, my friend, I'll be back.
13:01Still a small voice, I'll call.
13:05Peace in a small town.
13:09Peace in a small town.
13:19L is the angular momentum quantum number.
13:23It tells you the time and shape of equations.
13:26L is the angular momentum number.
13:28It is why we've said axis.
13:32And now we'll take negative and positive values.
13:44I'd say it's been less than an hour.
13:46Nothing obviously suspicious.
13:48No indications of a struggle.
13:51Marks on his arm suggest a history of self-harm.
13:54No sign of a suicide note on it.
13:56No, but the words on the board and the study notes at full volume
13:59send a pretty clear message, don't they?
14:06Is he OK?
14:08He found it, cut him down.
14:10Oh, God.
14:11I know.
14:20The headmaster called.
14:24It's Adam.
14:26We had a tutorial yesterday.
14:28I basically told him he was failing.
14:31It's not your fault.
14:32I didn't offer him any help.
14:35Adam was your pupil before he went up to uni, is that right?
14:38I was his chemistry teacher.
14:39He was a good lad.
14:42Did you see him this afternoon?
14:45No, I went home 10 minutes after we finished talking.
14:50There was some writing on the board in your class.
14:54Thanks.
14:55Was that there when you left?
14:58No.
15:00You mean he's blaming me?
15:02It's not clear yet.
15:05Can you imagine why he would choose to do this in your lab?
15:09He must have been angry at me for him.
15:12Pushing him to apply.
15:15I thought it's what he wanted.
15:16I really thought he'd do well.
15:18Sorry, the head.
15:20Do you mind?
15:21Of course.
15:35How you doing?
15:37Fine.
15:38Told me to expect it in this job.
15:40You were right.
15:42I can never get my head around kids killing themselves over exam stress.
15:47We should sound out Rachel.
15:50Maybe she confessed to him after our interview and that's what triggered it.
15:55Because otherwise, you know, why today?
15:58What happened today that tipped him over the edge?
16:01Sir.
16:04I'm concerned that I put undue pressure on Adam when I spoke to him in college earlier.
16:09What kind of undue pressure?
16:13He was so insistent that the hair couldn't have come off Rachel.
16:17It was just something strange about the way he seemed so...
16:21So I suggested that it transferred from his clothes because he was the one driving the car.
16:27Well, that's not undue pressure.
16:29That's a sensible line of inquiry.
16:32Come on.
16:46Hold on.
16:47Modern miracle?
16:48Where's the crutch gone?
16:49CCTV shows her in AME the night of Sigurd's murder.
16:52You wouldn't hang around in there all night unless you had to.
16:54Well, I might.
16:55I knew somebody was going to be killed and I fancied a walk to Tidalabon.
17:04I've no idea where she is.
17:05She ran out the door.
17:06She was a mess.
17:07I'm sorry.
17:09They shouldn't have told her about Adam over the phone.
17:11We said we'd come round.
17:12Yeah, hours later.
17:14Do you know when Rachel last had contact with Adam?
17:18We need to piece together what happened for his family, if nothing else.
17:25They spoke on the phone at 5, 5.30 maybe.
17:28Any idea what they talked about?
17:30Do you tell your mother what you talk to your girlfriend about?
17:33I'll have to ask Rachel if you can find her.
17:37How's the ankle?
17:40Fine.
17:40Better, thanks.
17:42Well, it must have been pretty serious.
17:44Six hours in A&E and it healed overnight.
17:47What are you now, a copper or a doctor?
17:49I only ask the question.
17:51Oh, you lot with your questions.
17:54You ask all the questions but you don't actually listen to the answers, do you?
17:59I'll tell you one thing they did talk about.
18:01They talked about you.
18:03Adam told Rachel what you'd said to him.
18:05She couldn't get him to calm down.
18:07A boy under that kind of pressure and a girl still grieving for her sister.
18:11But it's okay, isn't it?
18:13Because you've got a badge.
18:26She's just lashing out because she wants to avoid talking about her alibi
18:30because it's clearly dodgy.
18:32Can't take it personally.
18:34She's right, we don't listen.
18:35All we do is interrogate.
18:37Yeah, well, that's the job.
18:39We ask people difficult questions.
18:41It doesn't mean we're responsible for their decisions.
18:43Oh, I don't know.
18:44Well, I do.
18:46Look, take some time off tonight.
18:49Come and have dinner with me and Laura.
18:50No, thanks, I'm all right.
18:52You wouldn't be interrupting anything, it's a takeaway.
18:54Really, I've got plans.
18:56Thank you, no.
20:08So...
20:35I don't care about the reference number.
20:38I just want you to go out there and start looking or making some...
20:41Mrs. Clare?
20:45It's Rachel.
20:47She's not answering her phone and her friends haven't seen her.
20:50I didn't know what else to do.
20:58Is this a craft project or a cry for help?
21:01It's the only way I can get my head around how these two are connected.
21:04I still think you're going to miss this
21:06when you're growing carrots and watching Countdown.
21:08I'll find plenty to keep me busy.
21:10Night walk, though.
21:12What are you actually going to do?
21:13What does anyone do on Potter?
21:16Sir, I've just seen Debbie Cliff at the front desk.
21:17Rachel didn't come home last night.
21:19Well, that's all we need.
21:21Is there a report out for her?
21:22Yeah, the sergeant's working on it.
21:23Now, Hobson wants to talk to you.
21:25She's got the lab to cross-check Adam's DNA
21:27with the unknown DNA profiles from the car
21:29and we've found a familial match on one of them.
21:32Familial match?
21:37My wife's in a bit of a bad way.
21:39I'd rather let her sleep, if that's OK.
21:41That's fine.
21:43I'm sorry to bother you at a time like this.
21:45No, you're just doing your job.
21:49I don't know what I can tell you, though.
21:51We don't understand it ourselves.
21:54Did Adam ever talk to you about what was troubling him?
21:58I think it was all just building up.
22:01Exams, worrying about his goals,
22:04exams, worrying about his girlfriend,
22:06and then that man coming out of prison.
22:09Professor Seager, did you ever meet him?
22:12No, no, I've heard what happened to him, though.
22:16Have you ever been in his car?
22:20No, of course not.
22:22Why do you ask that?
22:23We found DNA belonging to one of Adam's close relatives
22:26in there, either a parent or a sibling.
22:29Well, that can't be right.
22:31He doesn't have any brothers or sisters?
22:33He was her only child.
22:36In that case, I'm afraid we will need a word with your wife.
22:40No, look, please, let's not involve Liz.
22:42I...
22:45I did meet him.
22:48And I have been in his car.
22:59It feels like we're throwing you out.
23:03Are you sure this is what you want?
23:04Honestly, I just need a proper night's sleep in my own bed.
23:10OK.
23:15Give us a shout if you need anything, won't you?
23:17I will, I promise.
23:26His teacher told us about this,
23:29this course where you could have proper coaching.
23:33Karl Drew's course.
23:36Yeah, yeah, that's the one.
23:40Mr Drew mentioned this college that he knew of where,
23:45sometimes for the right student, it might be possible to...
23:51stack things in their favour.
23:54Are you saying you paid to get your son into Bennison College?
23:58Yes.
24:00A 200 grand donation to the roof fund in exchange for an easy interview in a place.
24:08We...
24:09We did the deal in Professor Seeger's car.
24:12Who else was involved?
24:13It was just those two.
24:15And, oh, the master, Dr Yardley.
24:18Adam had no idea until yesterday.
24:21He found out?
24:22Seeger promised he would never know.
24:24Then this letter turned up from the prison a couple of months ago,
24:29saying that he'd changed his tune.
24:31Suddenly, it was all morally wrong.
24:34He was giving me 10 weeks to talk to Adam myself before he blew the whistle.
24:37Do you still have this letter?
24:39Adam made me show it to him.
24:42It was only then that he told me that the man was dead.
24:45So I could have got away with never telling him at all.
24:48That last conversation didn't have to be me humiliating my son.
24:52It could have been me telling him that...
24:58That I'd love every bone of him if he never passed a single exam in his entire life.
25:06Sorry.
25:12I'll get that letter.
25:17Sorry, what did you say your name was again?
25:19Oh, D.S. Hatham, um, James.
25:24You're the one who found him.
25:26But they said that you tried to help.
25:27I didn't help him.
25:28But you tried.
25:30Thank you.
25:32Thank you, James.
26:19D.I. Lewis, please.
26:27Okay.
26:29No, no, no, no message.
26:42Well, I guess it's all there, isn't it?
26:46I just wanted something that was mine, you know.
26:52I got fed up of being the other half of the great biochemist.
26:56So you set up Oxbridge Edge.
26:58It's a legitimate coaching business.
27:01There were only ever a handful of occasions when it turned into anything more.
27:04And how did those occasions work?
27:09Sometimes, with particular families.
27:12You could tell they would do anything.
27:14I'd scope them out.
27:16And if they were receptive, I'd put them in touch with Seager.
27:19It was a huge risk, obviously.
27:21The university would have come down on us like a ton of bricks.
27:25But if we could convince Yardley that it was watertight, it'd give us 10%.
27:31Did you receive one of these letters from Seager?
27:35A couple of months ago.
27:36What would that have done to you?
27:38Look, I see where you're going with this.
27:40But I didn't kill him.
27:44Hi.
27:46That was pretty horrible.
27:48I don't know why she wanted to go back there so soon when there's...
27:52Is everything OK?
27:55Carl?
27:57Well, the college needed money.
27:59That was a way to get it.
28:01I think it's the only thing that Professor Seager and I ever saw eye-to-eye on in 30 years.
28:09You didn't see eye-to-eye anymore.
28:10Seager was going to confess.
28:12You knew that.
28:12He was going to end your career.
28:14I took on this mastership with a very public promise to turn Bennison's fortunes around.
28:20I staked my reputation on it.
28:24But I failed.
28:26We reached the point of financial no return six months ago.
28:31The college will be forced to merge, leaving its master without a future.
28:37So there's really nothing that Richard's spiritual cleansing could have done
28:41to make things any worse.
28:58It's me.
28:59Call me as soon as you get this.
29:02I need to see you.
29:03Carl Drew, Yardley, and Mr. Tibbett, Adam's dad.
29:08Plus any of the other parents who received the same letter.
29:10Only one of them could have killed Seager to stop him talking.
29:12True.
29:14How does that connect to Sue Minn?
29:16Maybe it doesn't.
29:17You don't really believe that.
29:18Anyway, what about his blood on her suitcase?
29:21It was her tutor.
29:22He carried her suitcase once.
29:23It doesn't prove he killed her or that Seager was killed because of Sue Minn.
29:27It's a bit of a mystery.
29:29Maybe we started in the wrong place, starting with Seager.
29:42The answer has to be with Sue Minn.
29:46Come on.
29:47Where are we going?
29:47Back to the station where we've got an entire suitcase full of evidence.
29:52You didn't have any plans for tonight, did you?
29:59No.
30:16What exactly is it we're looking for?
30:19No idea.
30:21I've been looking at every photo, every book, every page of every folder until we find it.
30:29So
30:59the uniformer started at door to door.
31:02Definitely her.
31:03That's Seager.
31:04Now his wife.
31:05She hasn't been in there long.
31:06Only a couple of hours.
31:07Crimed?
31:08No, there's a puncture wound on the chest.
31:09So stabbed, then dumped, most likely.
31:12Given the location of the wound, there would have been a lot of blood at the scene.
31:16Martha's house is just upstream from here, isn't it?
31:18Let's head over there.
31:22Did you get her, Moon?
31:23Not yet.
31:24Someone's done a good job.
31:26But one of the boys noticed this.
31:30The missing one doesn't seem to be here.
31:34That's not good news.
31:38Not sure I follow.
31:39Well, Seager's murder seemed to be carefully planned.
31:42The pay's your gold phone, car keys stolen in advance.
31:45But if that's the murder weapon, then whoever stabbed his wife
31:49didn't even think to bring his own knife.
31:51And if it's the same person, they're getting desperate.
31:54According to the calendar in there, she kept a regular appointment with her GP.
31:58Next one was today at 3, so I thought I might go.
32:00Yeah, why not?
32:01See what you can find out.
32:03Can you keep us up to date with the door-to-doors?
32:05Just one thing so far, sir.
32:07A neighbor said she saw someone turn into the driveway last night.
32:10She recognized him because he used to teach her daughter.
32:12And Mr. Drew?
32:15What time was this?
32:16Around 6.
32:18Right, thanks.
32:22No need to let on that we can place him at the scene.
32:26Are you going to keep the GP appointment?
32:28Probably go and see what his wife might give away.
32:36I should never have left her in that house on her own.
32:41Where did you go after you dropped her off?
32:44I went straight home.
32:46Saw you.
32:48Discovered my husband was a fraud.
32:51And then I was here until late.
32:54How late?
32:552 AM, maybe.
32:59That's what I do when things are bad.
33:01I work.
33:04So you wouldn't be able to account for Carl's movements last night?
33:12Why are you so worried about where Carl was?
33:17You can't seriously think he had anything to do with this.
33:25If you look at the photo the manufacturer sent over,
33:28you'll see the pattern at the hilt of the knife
33:30matches the bruise pattern left around the wound.
33:33Oh.
33:35Hang on.
33:37James?
33:37I've just been speaking to Martha's GP.
33:39We've been asking ourselves the wrong question.
33:41Instead of asking ourselves why Martha was able to sleep
33:44through her husband being murdered outside of her window,
33:46we should be asking ourselves how the killer
33:48knew that she'd sleep through.
33:50OK.
33:51Her doctor says she was sleeping through her husband's
33:53A doctor says she kept pestering him to increase
33:56her prescription of sleeping pills,
33:57but he said no because he thought
33:59she was getting dependent.
34:01Then all of a sudden, one day the pestering just stops,
34:03and he says he suspects that she was getting
34:05the supplies from elsewhere.
34:07Another person supplying her?
34:08Well, exactly.
34:09If a killer was feeding her addiction,
34:11then he was helping her drug herself.
34:13Maybe Martha figured this out and confronted her supplier.
34:16Right, you need to find the pills.
34:17If we can prove that Carl's the one that supplied Martha,
34:20I reckon we've got him.
34:20OK.
34:22Dark matter.
34:25That is a very good example of one
34:26of the big scientific mysteries.
34:33Oh, um, we're nearly finished there.
34:35Do you need me to?
34:35No, no, no, no.
34:36Carry on.
34:36I can wait five minutes.
34:38Right.
34:40We'll make this the last one.
34:44Some of our scientists believe that over three quarters
34:46of the matter in the universe is invisible.
34:50Even to the most powerful telescope.
34:53They call this substance dark matter.
34:57If this theory is right, then the answers
35:00to some of our most important questions about the universe
35:03might lie not in the things we can see,
35:07but in the things we can't.
35:20Stone nose already?
35:25Why didn't you call me?
35:27Can you tell me what you did yesterday after I spoke to you?
35:31I listened to my wife shout at me for an hour.
35:35Then she stopped shouting and wouldn't talk to me.
35:41Eventually, I went to see Martha.
35:44So you admit that you were at the Reverend
35:46Seeger's house yesterday evening?
35:47There was nothing to admit.
35:49No.
35:51I went to see if she took some sense into stone.
36:00But there was no answer.
36:04I know you're not a fan of the blindingly obvious,
36:06but I'm going to state it anyway.
36:07The first 24 hours following a murder are too precious to waste
36:10on a 15-year-old case.
36:13Dark matter.
36:16What?
36:16It's not what we can see that's important.
36:19It's what we can't.
36:20Look at this.
36:21Look at this.
36:22Sue Min's lab notes.
36:24They're all meticulously cataloged
36:26by project and supervisor.
36:28Professor Gilchrist, Dr. Eason, Dr. Marbler.
36:33And when we get to Professor Seeger's section, nothing.
36:37Why is there no record of the work she did for him?
36:49If he was that well-organized, she'd have had it all
37:02backed up on one of these.
37:03According to the inventory from digital,
37:05you're looking for a section called amyloid,
37:07and there should be Professor Seeger file in there.
37:10The amyloid hypothesis, fibril formation,
37:14and neurodegeneration.
37:16Amyloid hypothesis.
37:18Don't pretend you know what it is.
37:20I'm sure I've heard of it.
37:22I think it's something to do with the breakthrough
37:24that made her famous.
37:26Who?
37:27Stella Drew.
37:28Prescription sleeping pills found in Martha's bedroom
37:33with your name on the bottle.
37:35You knew she was doubling her dose,
37:38so you knew she'd sleep soundly while you murdered her husband,
37:42Dr. Drew.
37:44Everything's all right.
37:45You're going to be all right.
37:46No, no, no, no.
37:47I'm not going to die.
37:49I'm not going to die.
37:51You were sick.
37:53I'm not going to die.
37:54I'm going to die.
37:55I'm not going to die.
37:56I'm going to die.
37:57Over 35 million people are living with Alzheimer's today.
38:01That's 35 million people fading away.
38:04Martha figured it out, didn't she?
38:06She confronted you in her kitchen.
38:08You grabbed a knife, and you stabbed her.
38:10Of course, it's not just people with a disease who suffer.
38:12It's their families, their children who have
38:14to watch this awful decline.
38:17Why did you murder Professor Seager?
38:21Was it because he killed Sue Min,
38:24or because he knew that you had?
38:27Richard didn't kill Sue Min.
38:28Neither of us did.
38:30It was an accident.
38:31An accident which enabled you to steal lab work from her file
38:36and pass it off as your breakthrough.
38:39We found a backup on a disk.
38:43It was my doctorate.
38:44Sue Min was my research student.
38:45So anything that she stumbled across was mine to publish.
38:47That's what Sue Min failed to grasp.
38:50Well, she was threatening to take the findings home
38:51with her for her own post-grad.
38:53So Richard and I went to talk some sense into her.
38:56Tell us about this accident.
39:00Eventually, we found her in the organ
39:03loft collecting up her music.
39:05She refused to have a sensible discussion.
39:08She tried to leave.
39:09Richard was holding on to her.
39:13And after that, I don't know.
39:18Suddenly, she was falling, and there was this crack.
39:25If it was an accident, why didn't you call an ambulance?
39:28I was going to, but he stopped me.
39:30He said if he went to prison, it would all fall apart.
39:33The research, my post-doc funding,
39:35everything we'd been working for.
39:40So I let him do it.
39:41I let him hide the body.
39:44And then when he cut himself on a nail in the attic,
39:46I took over.
39:50And then I lived with it every day for 15 years
39:53until I realized it wasn't over.
39:56It was all just a catalyst for everything else.
40:01What do you mean?
40:03Six weeks ago, Richard sent me the most extraordinary letter,
40:06three pages of waffle about God and the prison chaplain.
40:10And then there's one paragraph at the end casually
40:15blowing everything apart.
40:16Warning you he was going to confess.
40:19He was going to betray me.
40:22After 15 years of telling myself that if I worked hard enough,
40:25if the research could make enough difference,
40:27then what happened to Sue Minn might not be in vain,
40:29he was pulling the plug on it all.
40:31So you stole his car keys, you lured him outside,
40:34and you killed him, framing Rachel.
40:39Going to prison means abandoning my research,
40:40and I can't let that happen.
40:42I have a responsibility to see it through.
40:44Was it your responsibility to kill your mentor and his wife
40:48when she figured it out?
40:51Martha was my best friend.
40:53That's the hardest sacrifice I've ever had to make.
40:57She said she was going to the police.
40:59Stella Drew, I'm arresting you.
41:02If you're going to arrest me, you need to understand.
41:06My research isn't just some science project.
41:08This is work with genuine potential.
41:11It can make a difference to millions of lives.
41:14If I go to prison, you're setting that back by decades.
41:19I'm sorry, we're police officers.
41:22Decisions about the future of mankind
41:23don't really feature in our job description.
41:27Stella!
41:28Stella!
41:32Sal?
41:33What's happening?
41:43Sal!
41:44Sal!
41:46Sal!
41:48Sal!
41:49Sal!
41:52Sal, are you all right?
41:54I heard you were home, I wanted to see how you are and let you know that someone has
42:22confessed.
42:23Where did you go?
42:29I don't know, I just walked around.
42:32She'll be okay though, won't you?
42:35Just takes time, that's all.
42:37How can you keep making out you're sorry?
42:39When you were so jealous of him, you faked a fall just to get some attention.
42:45Yeah, I know.
42:51Don't leave it, okay?
42:54Well, there you go.
43:01First my husband left, then Erin.
43:11It's just me and Rachel now.
43:13Got what you came for?
43:18Clearing out Adam's room in college, returning things to his parents, thought you might like
43:34these.
43:37Thank you for taking the time.
43:45Are you alright?
43:48I think so.
43:56Are you alright?
43:59Surely you're not buying into all that stuff about the future of dementia.
44:05Stella Drew's not the only person working on it, you know?
44:08It's not that.
44:10I took your advice.
44:13Got a meeting with Innocent tomorrow morning.
44:15Oh, that's good.
44:17That's really good.
44:19I know you hate jumping through hoops, but...
44:22It's not to talk about promotion.
44:24It's to hand in my resignation.
44:27Your resignation?
44:30What's brought this on?
44:34This job makes you look at things differently, doesn't it?
44:37Well, I always told you it would.
44:39No, I know.
44:40I didn't understand.
44:41I don't like what I've become.
44:43I used to think that people were basically good.
44:47Now I don't, and I don't know when that changed.
44:50Well, that's just a sign that you're a seasoned copper.
44:54It's not a sign you should chuck it all in.
44:56Well, you love this.
44:57You're still going to go.
44:58Yeah, I think so.
44:59Before too long.
45:00But I've got to that stage.
45:02I got to that stage too, earlier.
45:05Got a feeling that's not what the fast track scheme's all about.
45:11Are you sure about this?
45:17I need a change.
45:20In that case, I need a drink.
45:23Come on.
45:36What?
45:38Nothing.
45:42We can still meet up for the odd pint, can't we?
45:46Two ex-coppers.
45:48Of course.
45:53They do a pensioner's special on a Tuesday.
45:56I could treat you.
45:57Oi, I'm still your boss, for now.
46:06I hope you don't feel it's been a waste being my boss.
46:11Training me up because I've appreciated it.
46:15It wasn't a waste.
46:18It was a pleasure.
46:21Thank you, sir.
46:22You're all right.
46:25And it's Robbie.
46:29Thank you, Robbie.
46:35Thank you.
47:05Thank you.