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  • : 24
  • : 17
  • BBC One
  • 21
  • Crime Documentary

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4
4x1
Episode 1
Episode overview
Detectives investigate the murder of a 17-year-old boy and gather evidence against a human trafficking gang, as public trust in the Met reaches a record low.
4x2
Episode 2
Episode overview
Detectives search for a missing young woman. After discovering CCTV footage of her going into a storage container with a man but never emerging, they fear she has been murdered.
4x3
Episode 3
Episode overview
Detectives investigate the murder of a homeless man who has been beaten to death in a London park and the rape of a young woman by a stranger on the street.
4x4
Episode 4
Episode overview
Detectives investigate the fatal stabbing of a motorcycle stuntman on a music video shoot. A manhunt team searches for a suspect on the run, accused of raping a 12-year-old girl.
4x5
Episode 5
Episode overview
An elderly couple are burgled and attacked in their home. The police call in the Flying Squad, an elite unit of covert officers who launch an operation to catch the perpetrators.
4x6
Episode 6
Episode overview
Detectives hunt for a man who has been sexually assaulting women in North London for two years, and investigate the mugging of an 87-year-old woman.