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Clarke - A Trained Killer: With a thirst for blood and a knife obsession, Michael Clarke believed it was his destiny to kill, and his parents were the victims.

The tragic story of 24-year-old Lee Irving, a young man with learning difficulties lured to his death by four people he thought were his friends.

The Railway Killers - John Duffy and David Mulcahy: A profile of the two murderers who terrorised Britain in the 1980s with a string of attacks near railway stations.

The Murder with No Body: The tragic case of 22-year-old Helen McCourt, who got off a bus one night in her hometown but never arrived at her nearby home. (S2, ep 11)

Judy Buenoano: The story of a killer so evil that not even her own son could escape her clutches. She became the first woman to be executed in Florida since 1848.

The Boston Strangler: Unheard Confession

Documentary series from New Zealand following the madness and mayhem faced by intrepid officers as they pull over motorists for a variety of suspected offences. (S15, ep 7)

Documentary series charting the exploits of the City of London police, charged with safeguarding the Square Mile at the heart of the crime-ridden capital. (S4, ep 6)

Reality series following Ireland's border agents working in passport control, immigration, security, policing and various counterfeit departments. (S2, ep 10)

The rescue chopper is called upon when there's a crash on the rainy roads of the Southern Alps. An unlucky driver's Nissan has been damaged by both a rock and an axe. (S4, ep 7)

There's trouble for speeding tourists who take a corner way too fast, and also for a man who tries to cheat the registration system when he's caught out by his ex-wife. (S4, ep 8)

Near Dunedin, a driver claims to be sober despite having thrown up in his car. Also, a minivan ends up on its side and a biker gets schooled on the rules of the road. (S4, ep 9)

The final episode of the season comes with plenty of drama as a crash manages to knock out the power to all of Clyde. (S4, ep 10)

Documentary series charting the exploits of the City of London police, charged with safeguarding the Square Mile at the heart of the crime-ridden capital. (S4, ep 2)

Get ready for crazy police chases, hilarious stunts that go wrong, snow and ice cause mayhem and heroic acts of rescue, all caught on camera. (S3, ep 2)

John Christie - 10 Rillington Place: The extraordinary tale of compulsive liar John Christie, who murdered six women and stored them in his home in Rillington Place. (S1, ep 5)

Diane Downs: A look at the cold-hearted criminal who was convicted of murdering her daughter and attempting to kill her two other children in 1983.

Gary Ridgway: A profile of the vicious killer who is thought to have murdered over 70 teenage girls and women in a reign of terror that started in the 80s.

Catching the Birmingham Spree Killer: In 2000, the bodies of three women were found in Birmingham. Could police hunt down the dangerous killer? (S4, ep 6)

Murdered Metres From Home: In 1986, 16-year-old Elaine Doyle was murdered just metres from her home - but catching her killer was no easy task. (S4, ep 7)

Yvonne McCann: The tragic story behind the killing of Yvonne McCann, murdered by her husband after a row at home in 2020.

Marion Price: The story of 63-year-old Marion Price, who was brutally shot and killed by her estranged husband in Northamptonshire in 2019.

Colin Campbell: Thirty-two years later, a convicted killer serving life for manslaughter is found to be guilty of having committed a second murder. (S7, ep 9)

Adrian Prout: A master manipulator is accused of the murder of his wife, and is eventually caught out by a polygraph test - and his own fiancée. (S7, ep 10)

Killed for being Kind: A woman dies in an apparently accidental house fire, but one police officer spots signs that something more sinister is at play. (S2, ep 4)

The Shoe Fetish Murder: The investigation of a murder of a mother in her home in 1994, as police used forensic clues to find an appalling killer. (S2, ep 5)

The Boston Strangler: Unheard Confession

Edmund Kemper: Criminologists profile Edmund Kemper aka "The Co Ed Butcher", the American serial killer whose spate of killings lasted from 1964 to 1973.