ELISE: I FOUND A RECORD OF A FARID AND YARA MALEH REGISTERING AT A CAMP IN CALAIS.

IT'S A SYRIAN NAME.

[GIRL SCREAMS] TAKE THAT OFF.

BREAKFAST ON THE TABLE.

COME ON, I'VE GOT TO BE AT WORK IN 5 MINUTES.

RICHARD!

KARL: THOSE CHILDREN HAVE BEEN MISSING FOR 3 DAYS NOW.

NO ONE COULD HAVE CARED LESS.

THE CARVER KIDS HAVE BEEN GONE, WHAT, TWO HOURS AND IT'S A CIRCUS.

POLICE!

ELISE: HIS NAME IS CHARLIE MOREAU.

8 YEARS AGO OLIVIER AND I ARRESTED HIS FATHER JACQUES FOR HIS MURDER.

TOOK THE JURY 40 MINUTES TO CONVICT HIM.

[SCREAMING] KARL: WHAT'S THAT?

ELISE: MISSING CHILDREN AND A PLAGUE OF RATS.

THAT DIDN'T END VERY WELL, DID IT?

[WOMAN SINGING INDISTINCTLY] SHAGGY: ♪ I'M MR.

LOVER, LOVER ♪ LOVER, LOVER, GIRL ♪ MR.

LOVER, LOVER [TURNS VOLUME UP] ♪ I'M MR.

LOVER, LOVER ♪ SHE CALL ME MR. BOMBASTIC ♪ ♪ SAY ME FANTASTIC ♪ TOUCH ME IN ME BACK, SHE SAYS I'M MR. RO...MANTIC ♪ ♪ CALL ME FANTASTIC ♪ TOUCH ME IN ME BACK, SHE SAYS I'M MR. RO ♪ CHARLOTTE GAINSBOROUGH: ♪ VENEZ DANS MES BRAS ♪ CLOSER TO ME, DEAR ♪ DONNEZ-VOUZ MOI ♪ SET ASIDE ALL FEAR ♪ RESTONS ENLACES ♪ POUR L'ETERNITE ♪ YES, YOU SHALL BE MINE ♪ TILL THE END OF TIME [WOMAN SPEAKING INDISTINCTLY OVER P.A.]

[WOMAN SINGING INDISTINCTLY] UM, SHE SPEAK ENGLISH?

YES.

YES, SHE DOES.

WHAT'S HER NAME?

UH, MANU ILONGA.

ACTUALLY, I'M NOT SURE THAT'S HOW YOU PRONOUNCE IT.

SHE'S PREGNANT.

DUE TO BE DEPORTED.

[WOMAN SHOUTS IN FRENCH] KARL: MRS. ILONGA.

MY NAME IS KARL ROEBUCK.

I'M AN ENGLISH POLICE OFFICER.

I DON'T KNOW ANYTHING ABOUT YOUR SITUATION 'CAUSE I'VE ONLY JUST ARRIVED, BUT I'M QUITE CERTAIN THAT YOU DON'T WANT TO HURT THAT LITTLE GIRL.

MANU: I WILL NOT GO BACK HOME.

THEY WILL HURT MY BABY.

WHO WILL?

MANU: THE MEN WHO KILLED MY DAUGHTER.

SHE WAS ONLY 3 YEARS OLD.

[SOBBING] I WILL NOT LOSE ANOTHER CHILD, DO YOU UNDERSTAND ME?

YES, I DO.

BUT YOU HURTING THAT LITTLE GIRL WILL NOT AVENGE THE DEATH OF YOUR DAUGHTER.

IF THAT CHILD FALLS, IT JUST STARTS AGAIN FOR ANOTHER PARENT.

AND WHAT THAT MEANS IS THERE'S ANOTHER MOTHER OR FATHER IN THE WORLD WHO WAKES UP EVERY DAY EXPERIENCING TWO SECONDS OF NORMALITY BEFORE REMEMBERING AGAIN THAT THEIR CHILD IS DEAD.

AND I DON'T KNOW ABOUT YOU, BUT I WOULDN'T WISH THAT ON MY WORST ENEMY.

SO...PUT THE CHILD DOWN.

I'M GOING TO ASK MY COLLEAGUE TO COME UP AND TAKE THE CHILDREN AWAY.

[QUIETLY] GO NOW.

YOU WANT TO COME TO ME?

THAT'S A GOOD GIRL.

THERE WE GO.

CAN YOU GET THE DOOR?

OK. JUST STRAIGHT DOWN.

[DOOR CLOSES, LOCKS] KARL: NOW WE'LL GET YOU SAFE, AND THEN WE'LL TALK SOME MORE ABOUT WHAT I CAN DO TO HELP YOU AND THAT BABY.

MAYBE I CAN STAY AT YOUR HOUSE.

NO, DON'T!

[SIGHS] [DOOR BUZZES] I WANT LILLY.

IT'S HER TOY ELEPHANT.

DO YOU KNOW WHERE HE IS?

YES, WE DO.

BUT IT'S IN THE LAB.

SO IT'LL BE A TIME BEFORE WE GET THAT BACK.

WHAT ABOUT YOU, THEO?

WHAT CAN YOU TELL US?

HOW LONG DO YOU THINK YOU WERE IN THAT LAUNDRY BIN FOR?

IS THE BLACK LADY DEAD?

HER COLOR IS IRRELEVANT, DARLING.

SHE'S IN THE HOSPITAL.

WHAT HAVE YOU GOT IN YOUR HAND?

PLEASE GIVE IT TO ME.

SHE'S TERRIBLY STUBBORN.

WELL, IF YOU GIVE IT TO ME, DCI ROEBUCK WILL GIVE YOU BACK YOUR ELEPHANT.

THANK YOU.

LILLY.

LILLY.

WHAT?

WHAT?

IT'LL BE MONTHS BEFORE WE GET THAT TOY BACK FROM THE EVIDENCE STORE TO GIVE IT BACK TO HER.

I DON'T BELIEVE I SPECIFIED A TIMEFRAME.

[INDISTINCT CHATTER] HI, FREDA.

I'M LAWRENCE FROM TFPLC SOLUTIONS.

YEAH, HAVING A NICE DAY?

ANOTHER DELIVERY FROM YOUR SECRET ADMIRER.

SHE MUST BE INTO TUBSTERS.

SO, FREDA, OUR RECORDS SHOW THAT YOU RECENTLY HAD AN ACCIDENT THAT WASN'T YOUR FAULT AND MAY BE ENTITLED TO COMPENSATION.

NO?

WELL, MIGHT HAVE SLIPPED YOUR MIND.

HAVE A LITTLE THINK, DARLING.

OH, BY THE WAY, YOU'RE OFFICIALLY A LEDGE.

THAT VIDEO YOU PUT UP HAS GONE VIRAL.

["MR. BOOMBASTIC" BY SHAGGY PLAYING] [TOILET FLUSHES] WOMAN: BREATHING IN GENTLY THROUGH YOUR NOSE AND OUT THROUGH YOUR MOUTH.

IN TRYING TO RELAX, AND RELEASE AS MUCH OF THE TENSION AS POSSIBLE.

SO BREATHING IN GENTLY THROUGH YOUR NOSE AND OUT THROUGH YOUR MOUTH.

SORRY.

SORRY.

SORRY.

WOMAN: COMMANDER CHAPUT...

I HAD TO PRY IT OUT OF FORENSICS' SWEATY LITTLE HANDS.

IT'S THE TOY THE KIDS WERE HOLDING.

ELISE: ANY PRINTS?

NOPE.

NO DNA, EITHER.

GOT THE RETRO FIT.

YOU KNOW, I'VE BEEN THINKING.

IF YOU NEED SOMEONE TO BE WORKING OUT OF CALAIS, I DON'T MIND GOING OVER.

THAT'S VERY GALLANT OF YOU, BB.

NOT EVERYONE IS AS KEEN TO GET INTO BED WITH THE FRENCH.

LET'S WATCH THIS.

[WOMAN SINGING INDISTINCTLY] PAUSE IT THERE.

[SINGING STOPS] ELISE: ZOOM IN.

"FIND SABAN KHASANOVIC OR I WILL PIPE ANOTHER TUNE."

THAT'S LIKE THE PIED PIPER.

HE PIPED ONE TUNE TO CHARM THE RATS AND ANOTHER TUNE TO CHARM THE CHILDREN.

SO WE NEED TO FIND SABAN KHASANOVIC.

[SEA GULLS SQUAWKING] [KNOCK ON DOOR] [DOOR OPENS] KARL: AND WE KNOW THAT THE CHILDREN WERE SMUGGLED INTO THE REMOVAL CENTER THROUGH THE LAUNDRY BY THIS MAN, TERRY HEANEY.

[TELEPHONE RINGS] WE'RE STILL TRYING TO TRACE HIM.

HE'S NOT BEEN APPREHENDED?

HE'S GONE AWOL.

MUCH LIKE YOUR CHAP WHO DUMPED ALL THOSE RATS INTO THE CHANNEL TUNNEL.

AND THE ONE WHO ABSCONDED IN THE SPEED BOAT.

YES.

SO WE HAVE TRAFFICKING, WE HAVE THE CARVER CHILDREN, AND THE USB STICK.

SERGEANT, COMMANDER CHAPUT NEEDS TO CATCH UP ON SOME READING.

CAN YOU SHOW HIM TO MY OFFICE, PLEASE?

AND YOU CAN WATCH THE ANIMATION IN THERE AS WELL.

WE'LL RECONVENE WHEN YOU'RE UP TO SPEED.

[DOOR CLOSES] [SIGHS] KHASANOVIC.

WHERE'S IT FROM?

EASTERN EUROPE SOMEWHERE.

IT'S HARD TO PIN DOWN EXACTLY WHERE.

THERE'S NO OFFICIAL RECORD OF A SABAN KHASANOVIC COMING TO THE UK.

MAYBE THAT'S SOMETHING FOR THE FRENCH TO LOOK INTO.

WE COULD SEND ONE OF OUR PEOPLE OVER TO HELP THEM.

[CLEARS THROAT] OR WE COULD SEND ONE OF THEIRS BACK.

IS SHE ACTUALLY DOING ANYTHING?

YEAH, SHE'S TRYING TO IDENTIFY THE ORIGIN OF THE SONG ON THE PIED PIPER FILM.

SHE THINKS IT MIGHT BE SOUTH SLAVIC.

PHONOLOGY, APPARENTLY.

OK. WELL, I'LL LEAVE THE LOGISTICS TO YOU.

GET YOUR AFTERSHAVE.

YOU'RE OFF TO FRANCE.

[MOUTHS WORDS] WOMAN: YOU KNOW THE MOST IMPORTANT SEXUAL ORGAN IN THE HUMAN BODY-- THE MIND.

IF THAT IS BROKEN, SO IS EVERYTHING ELSE.

[SEA GULLS SQUAWKING OUTSIDE] WE HAVE TIME.

I LOVE YOU.

KARL: LOOKS LIKE WE COULD HAVE FOUND OUR ENIGMATIC LAUNDRY MAN.

[CAMERA SHUTTER CLICKING] [INDISTINCT RADIO CHATTER] ELISE: YEAH, IT'S TERRY HEANEY.

SEE THE SWEETS?

MM-HMM.

SAME AS BEA CARVER'S.

[SIGHS] YEAH, IT'S HIM.

KARL: ALL RIGHT.

BLOODY HELL.

[SIGHS] CHARLIE.

NO!

NO.

[KNOCK ON DOOR] [DOOR CLOSES] [CHEERS AND APPLAUSE] WOW, I DIDN'T THINK YOU'D BE BACK AFTER LUNCH NOW THAT YOU'RE A SUPERSTAR.

WELL, I'VE GOT PHONE CALLS TO MAKE, HAVEN'T I?

STARTING WITH ONE TO SIMON COWELL.

YEAH, WELL, BEFORE WE DO THAT, BOSS WANTS TO SEE YOU.

ELISE: TERRY HEANEY HAD 15 METERS OF FILM IN HIS MOUTH AND ESOPHAGUS.

APPARENTLY HE INGESTED IT WHILE HE WAS STILL ALIVE.

I CAN'T IMAGINE THAT WENT DOWN TOO EASILY.

IT WAS COVERED IN OLIVE OIL.

HE USED AN IMPLEMENT TO SHOVE IT DOWN THE THROAT, PROBABLY THE COAT HANGER THAT THEY FOUND IN THE BACK OF HIS VAN.

THE QUESTION IS WHY.

YEAH.

LOOK AT THIS.

BRITAIN'S GOT NOTHING NOW.

BRITAIN'S GOT ... ALL.

IMMIGRANT KIDS WANT TO COME OVER HERE AND EARN MONEY.

I GOT AN IDEA FOR YOU, AN IDEA FOR FREE.

WHY DON'T WE GET THE MUSLIMS OUT?

WHY DON'T THEY JUST BLOW EACH OTHER UP?

THEN WE GET OUR JOBS BACK, OUR COUNTRY BACK.

COMMON-- I'M ACTUALLY THINKING OF NOMINATING HIM FOR A PRIDE OF BRITAIN AWARD.

HE WAS MADE TO EAT HIS OWN WORDS.

HEY, IF I WENT INTO WORK TOMORROW AND ASKED HIS WIFE OVER HIS DESK, HE'D ASK ME WHICH HOLE I FANCIED.

HA HA HA!

EH, I WOULD, MATE, BUT HIS WIFE'S A MUNTA.

500,000 HITS IN THE LAST 10 MINUTES.

I NEVER POSTED IT.

I NEVER POSTED ANY OF IT.

BUT YOU SAID IT.

HELLO, MATE.

BB, LOOKING GOOD.

FIGHTING A GOOD FIGHT.

YEAH, YEAH, YEAH.

YOU REMEMBER LOUISE.

YEAH, HEY.

HOW'S IT GOING?

SO, ANY CLOSER TO FINDING THIS SABAN KHASANOVIC CHARACTER?

NO.

BUT WE HAVE A LEAD ON THE RATS IN THE TUNNEL.

LOUISE: YEAH, THE RATS WERE BRED IN VERY BAD CONDITIONS.

WE HAVE A PHOTO.

THE TEAM IS CHECKING FOR A LIST OF ANIMAL BREEDERS WHO HAVE BEEN PROSECUTED FOR BAD PRACTICE.

IT'S POSSIBLE THAT ONE OF THEM IS TRADING AGAIN.

MAYBE BREEDING FEEDER RATS TO SELL ON THE INTERNET.

FEEDER RATS?

WHAT DO THEY FEED ON?

THEY DO NOT FEED ON.

THEY ARE FOOD.

FOR PET REPTILES.

OK, SIT DOWN HERE.

HERE.

[TELEPHONE RINGING] ELISE: THE SONG ON THE ANIMATION, IT'S A LULLABY ABOUT A SLEEPLESS CHILD.

COULD ALSO BE A DEAD ONE.

SO WHAT LANGUAGE IS IT IN THE ORIGINAL?

BOSNIAN.

SO MAYBE THE SABAN PITCH IS OLDER THAN WE THINK.

MAYBE IT'S FROM THE YUGOSLAVIAN WAR IN THE 1990S.

HOW ABOUT THAT?

SO HE'D BE IN HIS MID-TWENTIES NOW.

HMM.

ALL GROWN UP.

YOU KNOW, IT'S TRADITIONAL WHEN YOU'RE IN THE COMPANY OF SOMEBODY THAT YOU KNOW TO SAY, "HELLO."

HELLO, MAYA.

NOT YOU.

HELLO, ELISE.

WE'VE GOT AN EARLY START TOMORROW, SO ELISE IS GONNA STAY WITH US TONIGHT.

THAT'S NICE, ISN'T IT?

MAYA: MM-HMM.

WHO--WHO ARE YOU MESSAGING?

WHO'S MESSAGING YOU?

NO ONE.

COME ON, LET ME SEE.

IT'S JUST A GIRL FROM SCHOOL.

IT'S NOT A BOY.

AHH.

LET ME SEE THAT AGAIN.

IS SHE VAPING?

[KNOCKS ON DOOR] [COUGHING] I THINK WE'RE IN THE RIGHT PLACE.

I'LL CHECK THE REST OF THE HOUSE.

[RUSTLING] [INDISTINCT CHATTER] [HUMMING] SO THE CARVER CHILDREN TESTED POSITIVE FOR THE SAME SEDATIVE USED ON THE KIDS ON THE BOAT.

WHAT ABOUT TERRY HEANEY?

HE'S CLEAN ON THE SEDATIVE.

I'VE ASKED THEM TO RUN EXTRA TESTS AT THE LAB.

WHY?

I'VE BEEN WATCHING THAT CCTV FOOTAGE OF HIM PUSHING THAT LAUNDRY BIN ROUND THE REMOVAL CENTER.

I'M JUST WONDERING IF HE WAS GIVEN SOMETHING TO MAKE HIM COMPLIANT.

LIKE WHAT?

IN BOGOTA NOW, APPARENTLY, IF YOU WANT TO ROB SOMEONE, YOU JUST BLOW A BIT OF SCOPOLAMINE AROUND THEM, THE TOURISTS RUN TO THE ATM, AND HAND OVER THEIR MONEY QUITE HAPPILY.

YOU DON'T NEED GUNS.

IT'S BRILLIANT.

THAT'S AN URBAN MYTH.

IT WOULD EXPLAIN THE GAS MASK.

IT'S A VERY FINE DUST.

YOU'D NEED SOMETHING TO PROTECT YOURSELF.

IT'S GOOD THAT SHE HAS FRIENDS.

VAPING.

IS THAT NORMAL AT THAT AGE?

IT'S BETTER FOR YOU THAN SMOKING.

IS IT?

SUCKING COLORED LIQUID OUT OF A VIAL?

IT'S LIKE SOMETHING OUT OF A DYSTOPIAN SCI-FI.

CHRIST.

MAYBE THAT'S WHAT'S HAPPENED.

THE DYSTOPIAN FUTURE ISN'T THE FUTURE ANYMORE.

IT'S NOW.

WE DIDN'T EVEN NOTICE.

WHAT'S A JUMBO SAVELOY?

THANK YOU.

[COUGHS] 8 DAYS AGO, MADAME SELLIER SOLD A THOUSAND RATS TO A CASH BUYER.

HER EYESIGHT ISN'T REALLY GOOD, BUT SHE SAYS HE SPOKE ENGLISH WITH A STRANGE ACCENT.

ARE YOU SICK?

THE SMELL GOT ME.

IT'S NOT THAT YOU'RE AFRAID OF RATS?

NO.

COURSE NOT.

FUNNY.

I DON'T USUALLY LIKE WEAK MEN.

UGH!

COME ON.

REPORTER: THEY GATHERED FOR A SECOND TIME TO LAY THEIR CHILDREN TO REST IN SARAJEVO.

THIS COUPLE DIED IN ONE ANOTHER'S ARMS AFTER BEING GUNNED DOWN BY A SNIPER WHILE TRYING TO ESCAPE THE BESIEGED CITY.

HEY.

HI.

WHAT ARE YOU WATCHING?

ABOUT 25 YEARS AGO, THERE WAS A WAR IN WHAT'S NOW CALLED BOSNIA.

AND THERE WAS A YOUNG MUSLIM WOMAN AND A CHRISTIAN MAN, AND THEY WERE ON DIFFERENT SIDES, BUT THEY WERE IN LOVE AND THEY DECIDED TO TRY AND LEAVE THE CITY.

AND THEY GOT AS FAR AS THIS BRIDGE, WHERE A SNIPER SHOT THEM.

THEY WERE CALLED THE ROMEO AND JULIET OF SARAJEVO.

HAVE YOU SEEN THE VIDEO OF THE GUY DANCING WITH THE DOUGHNUT?

NO, I HAVEN'T.

[DOORBELL BUZZES] DON'T GET UP.

CELESTE.

BLOODY HELL.

AM I NOT ALLOWED TO VISIT MY FAVORITE GRANDDAUGHTER?

DID LAURA SEND YOU?

NO.

BUT I HEARD THAT YOU WERE BUSY ON A BIG CASE, SO I PACKED MY BIG CASE AND GOT ON THE TRAIN.

THERE'S NO NEED, YOU KNOW.

WE'RE ALL RIGHT.

WHAT ELSE HAVE I GOT TO WORRY ABOUT THESE DAYS?

NANA C. OHH.

HOW IS MY BIG GIRL?

HELLO.

[DOOR CLOSES] [PRINTER BEEPS] OH, DO YOU HAVE ANOTHER INK CARTRIDGE?

KARL: UH, YEAH.

I TOOK OUT A MORTGAGE A WHILE AGO, GOT A PACK OF 3.

IS IF MAKING YOU FEEL BETTER, DOING ALL THIS JACQUES MOREAU STUFF?

NO.

BUT MY FEELINGS ARE IRRELEVANT.

YOU KNOW WHAT YOUR TROUBLE IS, YOU HAVEN'T LEARNED TO FAIL.

YOU SHOULD TAKE A LESSON FROM ME.

I'VE GOT A PH.D IN ... NOT AT WORK, THOUGH.

ONLY IN YOUR PERSONAL LIFE.

IS THAT WHAT THEY SAY?

I'M THE SAME.

WELL, UNTIL NOW, WHEN I ... AT WORK AS WELL.

I'M A DOUBLE ... ERYKA WASN'T YOUR FAULT.

YEAH, SHE WAS.

CHARLIE MOREAU WASN'T YOUR FAULT.

CAN YOU FIND THE INK CARTRIDGE OR NOT?

MM-HMM.

OK. [SIGHS] CELESTE: YOU WANT IT?

OH, NO.

COMES A TIME WHEN EVERY WOMAN HAS TO CHOOSE BETWEEN HER FACE AND HER ASS.

I'LL COOK TONIGHT.

YOU CAN HELP.

I CAN'T COOK.

YES, YOU CAN.

AND IF YOU CAN'T, IT'S TIME YOU LEARNED.

YOU'RE 13.

I MADE A TARTE TARTIN WHEN I WAS 13.

FOR MY BOYFRIEND.

HIS NAME WAS CEDRIC HENRI.

HMM.

WHAT WAS HE LIKE?

I'M NOT SURE.

I DIDN'T STAY WITH HIM VERY LONG.

HE, UM...

I KIND OF JUST USED HIM TO LOSE MY VIRGINITY.

YOU--YOU LOST YOUR VIRGINITY WHEN YOU WERE 13?

TO A BOY, YEAH.

TO A GIRL WHEN I WAS 15.

OH, MY GOODNESS.

RIGHT.

GREAT.

BYE.

[BLOWS] I'M GOING TO WORK.

STAY OFF THE ... INTERNET.

[DOOR OPENS, CLOSES] [DISHES CLATTERING] [CELL PHONE CHIMES] [CHIME] [DOORBELL RINGS] QUIT WITH THE ... DOUGHNUTS!

[KICKS BOX] [CELL PHONE CHIMES] [CELL PHONE CHIMES] [CHIME] THIS IS CARRIE.

LEAVE A MESSAGE.

CARRIE, CALL ME BACK WHEN YOU GET THIS.

I THINK I'M BEING HUNTED.

YEAH.

[CELL PHONE CHIMES] [GRUNTS] OH, MY GOD.

[CHIME] OH, NO.

NO!

[CELL PHONE CHIMES] SHUT UP!

SHUT UP!

[CELL PHONE CHIMES, POWERS DOWN] WHO THE ... ARE YOU?

NO.

I'M NOT SCARED OF YOU.

YOU CAN'T GET ME.

HA!

WHAT CAN YOU SEE NOW, HUH?

... ALL!

NO, YOU DON'T SEE NOTHING.

HOW DO YOU SEE ME?

YOU NEED TO GET RID OF ADAM'S POSSESSIONS.

YOU THINK I'M MORBID.

I THINK THE BOXES POSE A FIRE RISK OR WILL ATTRACT DAMP.

[CHUCKLES] CAN'T HAVE IT BOTH WAYS.

THANK YOU FOR COMING.

[DOOR CLOSES] [SEA GULLS SQUAWKING] [EXHALES] [SOBBING] [DOG BARKS] [DOG BARKING] SHH!

[DOG YELPS] HI.

HI.

I WAS JUST PASSING, WONDERED HOW THE KIDS ARE.

GREAT, ALL THINGS CONSIDERED.

GOOD.

UM...

THE TOY ELEPHANT THAT BEA LOST, LILLY-- WE'VE ALREADY REPLACED IT.

OH, HAVE YOU?

YEAH.

AH, GOOD.

GOOD.

OK.

I WAS JUST...

I, UH...

THIS BELONGED TO MY SON.

AND, UM, I JUST THOUGHT, BUT...

SO WE'RE EATING.

SURE, OK. UM, ADAM.

MY SON'S NAME.

ADAM.

RIGHT.

OK. [SEA GULLS SQUAWKING] OK. [CLICK] [GASPS] [HORN HONKS, DISTANT ALARMS] MR. MOREAU.

[DOOR CLOSES] BB: SO THERE WAS A CENSUS IN 1991, BUT THERE'S NO MENTION OF ANY SABAN KHASANOVIC.

WE THINK THAT HE WASN'T BORN YET.

ALL RIGHT, MAYBE.

SHOW THE MAP, PLEASE.

THERE YOU ARE.

EXCUSE MY FRENCH.

WHAT HAVE YOU GOT THERE?

IT'S A DATABASE OF ALL THE PEOPLE WHO DIED DURING THE WAR IN BOSNIA.

IT IS CALLED THE BOSNIAN BOOK OF THE DEAD.

IF SABAN KHASANOVIC OR HIS PARENTS DIED IN THE CONFLICT, IT MIGHT BE IN THERE.

NOPE.

[WOMEN SINGING INDISTINCTLY] WHAT ARE YOU DOING HERE?

YOU KNOW HOW I LOVE AN ALL-NIGHTER.

GO ON.

WHAT?

TAKE A BREAK.

I'M ALL RIGHT.

TERRY HEANEY TESTED POSITIVE FOR SCOPOLAMINE.

NO WONDER HE WAS COMPLIANT.

[WOMEN SINGING INDISTINCTLY] MARCO KHASANOVIC WAS KILLED IN A SNIPER ATTACK IN AUGUST 1994.

[KARL SIGHS] SO...WHOEVER WANTS US TO FIND SABAN, IT'S NOT HIS FATHER.

WELL, WE HAVEN'T FOUND HIS MOTHER AMONGST THE DEAD YET.

[SONG CONTINUES] [SCREAMING] - Each season has a really different identity.

So first season, obviously, is in the musculature of its parent show, The Bridge.

The second season is very much Ben Richards version of The Tunnel, with his passions, his political obsessions, the things he's interested in really beautifully realized.

And for the third season, when we knew Ben couldn't come back because of other commitments, we needed a writer who would similarly bring a whole vision to the show, and make it feel utterly their own.

And we were very lucky to find Emilia di Girolamo, who comes at it from a very different place to Ben, but was utterly respectful of what The Tunnel was.

- It's a writer's dream to write on a show like this.

- She brings a very different kind of energy to the story.

- I mean, well, fasten your seat belts, cause it's a, it's a real, yeah that sounds real cliché to say it's a rollercoaster, but it really is.

- Emilia came up with a brilliant notion, which was about children, parents and children, lost children, the refugee crisis was something we were all really aware of and wanted to explore.

- What I love about The Tunnel is, that kind of mixing of politics, and what's going on politically with the crime genre.

So I was reading those articles that came out about the ten thousand missing refugee children, and just really struggling believing that that could happen, and that kinda no one cared.

That was kind of a moment that made me go, I have to write about this.

I have to tell this story.

I have to tell the story of one of those children or, you know, where are they?

What's happened to them?

Those are the questions we need to be asking.

And, and so, very quickly, I kind of realized that's what I wanted to write about.

- It's a story this time about lost children, and what ultimately is a human life worth.

- A toy car?

Why aren't forensics here?

- [Man] You'll have to ask the Governor.

The boat's going back to France later today.

- What starts as potentially a child smuggling operation, or at least an investigation into child trafficking, it becomes clear that somebody has done this for a very specific purpose, and to deliver a very specific message.

(eerie music) - It's real kind of topical and political edge that runs right the way through it.

But what kind of marries it with, with a, a thriller element as well.

- To know right up front, that I would be writing the last series was great.

Because you don't have that situation where you're thinking about hooks for next season and not knowing, that kind of uncertainty.

So having that really clear idea that this is the last season was actually liberating as a writer and quite inspiring.

Because then you think, how do I end this story for these amazing characters?

- You know your trouble is, you're meant to fail.

You should take a lesson from me.

I've got a PhD in ....... up.

- Not a work though, when you're passing a life.

- I'm in love with Karl and Elisa's relationship.

- I think Karl and Elisa's friendship is quite a special one I think for me it's unusual and refreshing watching a male and female partnership that is purely platonic.

- Thank you for coming.

- I think it's quite rare to talk about relationships between a man and a woman without turning it into some kind of romance somehow.

- Hello.

- Watching their friendship develop, how they pick it up again each season in a slightly different place, but finding that connection that only they share, is one that I really love watching.

- People have so much to watch on television, and if they don't love your character, and want to come back and spend more time with them and hang out with them, and for them to be part of their lives, they're not gonna come back.

- I've watched it since it came out religiously, and it's a real pleasure to go work on something that you've enjoyed watching, particularly when you've set out to tell the final chapter of the story.

- I hope there is something uplifting about the show.

I really, really hope it achieves something in terms of giving the audience a sense of everyday human heroism of wonderful flawed human beings being marvelous.

- I think will be emotional.

That's our aim.

- [Announcer] This program is available on DVD.

To order, visit shop.pbs.org or call 1-800-PLAY-PBS.