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Christopher Halliwell. Christopher Halliwell is known to have killed two young women - is he responsible for more unsolved disappearances? Experts analyse his police interviews. S4, Ep4

Neil Entwistle. A young father returns to England after his wife and baby daughter are found shot dead at their US home. What really happened? Experts analyse his behaviour. S4, Ep5

Trailing The Devil. A nightmare wreaks havoc on the village of Armada, Michigan when 14-year-old April Millsap is found murdered on a bike trail. But, evidence is scant. S5, Ep7

Deadly Heist. When an employee at an armoured van company receives a call about a money shipment that did not arrive, an FBI search for the missing van begins. S4, Ep6

Teleshopping.

Teleshopping.

Teleshopping.

Teleshopping.

Miami Menagerie. A mission becomes personal when Miami's animal cruelty investigators find two adopted dogs wandering the city streets in need of help. S16, Ep3

The team face a tricky night-time landing as they race to the scene of a serious car crash. Plus, a 53-year-old man has collapsed and needs CPR. S6, Ep5

A veteran motorcyclist and his grandson need treatment after a serious crash. Plus, the team race to help a man who is suffering a cardiac arrest. S6, Ep6

An officer responding to a fight is viciously assaulted at the hands of a violent criminal and officers are forced to get a family to evacuate a house after arson threats are made. S3, Ep1

Officers in pursuit of a burglar are given the run around by the elusive thief and a strange break-in at a hotel unearths an unexpected mystery in Stoke-on-Trent. S2, Ep4

Susan Warne. When a kindly old man is found murdered his family are devastated. But police discover his niece's bingo habit and debts would lead her to kill. S3, Ep6

Death By Desire. Paige Birgfeld is the ultimate multi-tasker, balancing family and jobs. But beneath the façade, she is hiding a dark secret that will lead to the ultimate betrayal. S2, Ep10

Michele Whitaker: The Last Truck Stop. Michele hitches from a truck stop and vanishes. But her family never give up hope, and incredibly the case ends, years later, with a miracle. S1, Ep3

Seen At Susan's. When Susan Casey disappears, CCTV footage reveals three likely suspects on the scene. It's impossible to tell who's responsible until a video shows someone is lying. S4, Ep2

Tracie Andrews & Mike Gifford-Hull. What exposed Tracie Andrews' lie that a road rage attack killed her lover? Mike Gifford-Hull's TV plea for his missing wife Farsi hides the truth. S2, Ep2

Stages Of Grief. In California, an intruder brutally attacks and kills Joan Dawley. Secret home movies uncover a shocking tale of deceit, and a monster lurking behind the scenes. S3, Ep3

Off-Camera. A video blogger posts every detail of her life online. One night, intruders break in her home and kill her husband. Will her endless videos provide a clue as to why? S3, Ep10

He's Not Going To Stop. In Arizona, a community is shocked when an unknown shooter goes on a killing spree. Police bodycams capture the hunt for the murderer. S3, Ep2

Rachel Williams/Thomas Edwards. A woman's life hangs in the balance after she escapes a controlling relationship. Plus, a family are left devastated as a result of dangerous driving. S5, Ep4

Black Widow. When a young man with a developmental disability vanishes, his legal guardian frantically searches for him. Police turn to CCTV to find him. S8, Ep18

Cemented In Fear. After a young Ohio man vanishes without a trace, detectives embark on an investigation involving a love triangle, drugs, and murder. S1, Ep1

Alone At The Cabin. A father's desperate search for his daughter leads him to an abandoned cabin in rural Canada. A surprise witness helps expose unspeakable crimes. S1, Ep1

Silent Witness. A respected businessman vanishes after a meeting. At the same time, a young mother doesn't come back from her job search. Can CCTV cameras help to solve the mystery? S1, Ep6