"Operation Pear Tree" is the first episode in Series 5 of Line of Duty. It was first broadcast on 31st March 2019.
When three police officers are shot dead during the hijack of a seized-drugs transport, AC-12 move in to investigate possible police collusion.
John Corbett is the ruthless head of an Organised Crime Group (OCG) and no stranger to violence. With his second in command, Lisa McQueen, he executes an audacious hijack of a seized drugs transport using information from corrupt police officers. As the body count rises and gets closer to home, AC-12 realise they are up against their most destructive adversary yet.
- Stephen Graham as Detective Sergeant (DS) John Corbett
- Martin Compston as DS Steve Arnott
- Vicky McClure as Detective Inspector (DI) Kate Fleming
- Adrian Dunbar as Superintendent Ted Hastings
- Maya Sondhi as Police Constable (PC) Maneet Bindra
- Rochenda Sandall as Lisa McQueen
- Aiysha Hart as DS Sam Railston
- Tony Pitts as Detective Chief Superintendent (DCS) Lester Hargreaves
- Sian Reese-Williams as Police Sergeant (PS) Jane Cafferty
- Susan Vidler as Detective Superintendent (DSU) Alison Powell
- Alastair Natkiel as Lee Banks
- Tomi May as Miroslav Minkowicz
- Gregory Piper as Ryan Pilkington
- Ace Bhatti as Police and Crime Commissioner Rohan Sindwhani
- Taj Atwal as PC Tatleen Sohota
- Barry Aird as Paul Slater
- Manuuv Thiara as Vihaan Malhotra
- Max Dowler as Mark Fleming
- Jo Dow as PC Paul Harris, Maneet's Rep
- Thomas Finnegan as Hotel Receptionist