Series 6 is the currently airing series of Line of Duty. It was commissioned alongside Series Five in 2017. It surrounds DCI Joanne Davidson, the SIO of an unsolved murder whose unconventional conduct raises suspicions at AC-12, while also progressing the ongoing storyline. The series premiered on March 21, 2021.
For clarification in relation to any acronyms used throughout the series, please check the Police Ranks page.
- Kelly Macdonald as DCI / DSU Joanne Davidson
- Martin Compston as DS / DI Steve Arnott
- Vicky McClure as DI Kate Fleming
- Adrian Dunbar as Supt. Edward "Ted" Hastings
- Anneika Rose as PS Farida Jatri
- Nigel Boyle as DSU Ian Buckells
- Shalom Brune-Franklin DC Chloe Bishop
- Perry Fitzpatrick as DS Christopher "Chris" Lomax
- George Costigan as Former CS Patrick Fairbank
- Ace Bhatti as PCC Rohan Sindwhani
- Elizabeth Rider as DCC Andrea Wise
- Christina Chong as DI Nicola "Nicky" Rogerson
- Amy De Bhrun as Stephanie "Steph" Corbett
- Gregory Piper as PC Ryan Pilkington
- Andi Osho as Gail Vella
- Owen Teale as CC Philip Osborne
- For episode by episode credits see the individual episode pages.