Line Of Duty 2019 continues on BBC One tonight - here's all you nee to know about Series 5.
The cast and first spoilers from the new set of six episodes have been revealed as the dramatic series kicks off.
Line Of Duty airs at 9PM on Sunday nights on BBC One. You can watch episodes online via iPlayer.
You can also pre-order series 5 on DVD right now here for its release in May.
Line Of Duty 2019 cast
Stephen Graham (Save Me, Taboo, This Is England) will star as guest lead in Line Of Duty series five.
Graham will play John Corbett alongside Rochenda Sandall (Girlfriends, Broken) as Lisa McQueen - two pivotal figures in a deadly organised crime group. Known to have links with corrupt police officers and suspected to be under direct command of the shadowy figure known only as 'H', Corbett and McQueen become persons of interest to AC-12 following an explosive chain of events.
Line Of Duty series five, written and created by Jed Mercurio and made by World Productions for BBC One, will follow a new case for AC-12 set nearly two years on from the hit crime drama's previous instalment.
Joining regular series lead stars Vicky McClure (DS Kate Fleming), Martin Compston (DS Steve Arnott) and Adrian Dunbar (Supt. Ted Hastings), the new series will also see the return of Maya Sondhi as PC Maneet Bindra, Polly Walker as Gill Biggeloe, Aiysha Hart as DS Sam Railston, Tony Pitts as Det. Ch. Supt. Les Hargreaves and Andrea Irvine as Roisin Hastings.
They will be joined by Line Of Duty newcomers Taj Atwal (In The Club, Stella), Richard Pepple (Motherland, Beasts of No Nation) as new regulars PC Tatleen Sohota and PS Kyle Ferringham, alongside Susan Vidler (Shetland, The Coroner), Sian Reese-Williams (Hidden, Requiem), Ace Bhatti (Bohemian Rhapsody, No Offence) and Elizabeth Rider (Informer, Doctor Foster).
Line Of Duty spoilers
In Series 5, 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, the ruthless leader of an Organised Crime Group (OCG), are behind the hijack but AC-12 investigators Superintendent Ted Hastings (Adrian Dunbar), Detective Inspector Kate Fleming (Vicky McClure) and Detective Sergeant Steve Arnott (Martin Compston) suspect corrupt police officers of leaking information.
As the body count rises, AC-12 realise they’re facing their most vicious adversary yet.
In tonight's fourth episode (April 21), Tensions rise in the OCG following the events at Eastfield.
With troubling questions hanging over the identity of ‘H’, suspicions mount at AC-12.