Hugh Bonneville DCI Brian Boyce Actor Dominic Cooper Edwyn Cooper Actor Tom Cullen John Palmer Actor Charlotte Spencer Nicki Jennings Actor Jack Lowden Kenny Noye Actor Sean Harris Gordon Parry Actor Adam Nagaitis Micky Mcavoy Actor Emun Elliott Actor Stefanie Martini Marnie Palmer Actor Sam Spruell Charlie Miller Actor Stephen Campbell Moore Tony Lundy Actor Beth Goddard Shirley Actor Dickie Beau Actor Robyn Betteridge Palmer's Daughter Actor Niall Bishop Jay Actor Simon Brading Sunday Times Journalist Actor Antonia Desplat Léna Actor Amanda Drew Assistant Commissioner Cath McLean Actor Amelia Isaac Jones Linda Actor Tom Keller Sid Actor Johnny Melville Tourist Actor Phoebe Pryce Wendy Actor Jonathan Rhodes Clive Actor Joshua Samuels Jerren Actor Sean Teale Enriqué Actor Neil Forsyth Writer, Executive Producer Charlie Leech Producer Ben Farrell Executive Producer Nick Lambon Executive Producer Patrick Harkins Director