Line of Duty

20126 series
Available on
BBC One

After refusing to help cover up an unlawful and fatal shooting by members of his team, Detective Sergeant Steve Arnott is transferred to Anti-Corruption Unit 12, AC-12. Run by zealous Superintendent Ted Hastings, the department is responsible for investigating possible corruption within the Central Police force. Working alongside DS Arnott is Detective Inspector Kate Fleming, who is an undercover specialist. With the help and oversight of Hastings, Arnott and Fleming take on difficult cases, which lead from "laddering" to mishandling evidence.

A Disastrous Affair: Episode Image
Episode 1A Disastrous Affair

Episode 1. Steve Arnott realises the target in his anti-corruption case is the city's top detective. Contains some upsetting scenes.

Episode 2: Episode Image
Episode 2Episode 2

Having been duped into covering up Jackie's crime, Gates tries to sever ties with her. Contains some strong language.

Episode 3: Episode Image
Episode 3Episode 3

Arnott is convinced Gates played a part in Jackie's disappearance. Contains some strong language.

Terror: Episode Image
Episode 4Terror

Episode 4. Desperate for proof of Gates's corruption, Fleming pushes their relationship to the limit. Contains some strong language.

Episode 5: Episode Image
Episode 5Episode 5

With Gates on the run, the anti-corruption team come under pressure to close the case. Contains some strong language.

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