Idris Elba
— Malcolm Gray
William Hope
— Mark Star
Eamonn Walker
— Darnell Gray Jr.
Monique Gabriela Curnen
— Valentina Gray
Richard Brake
— Scott O'Keefe
Lara Pulver
— Diane Shaw
Clarke Peters
— Ola Adenuga
Julian Wadham
— Gregor Salenko
Gerald Kyd
— Gustavo Helguerra
Mem Ferda
— Andriy
Niall Greig Fulton
— Vladimir
John Kazek
— Dimitri
Annette Badland
— Stephanie Gumpel
Joe Holt
— Ronny Tarbuck
Deobia Oparei
— Roy Clogham
Juliet Howland
— Anne
Christina Chong
— Jane
Michael Alspaugh
— Carl
Michael Callaghan
— Mikhail
Finlay Harris
— Darnell's supporter
Adam Smith
— Rescue Worker
Ben Bradley
— Bodyguard (uncredited)
Calum Cormack
— Backer (uncredited)