Hugh Bonneville

as DSI Iain Barclay

Patrick Malahide

as John Poole

Penelope Wilton

as Barbara Poole

Edward Woodward

as Vic Marsham

David Oyelowo

as Matt Wellings

Sarah Smart

as Sarah Wheeler

Richard Harrington

as Daf Parry

Charlie Creed-Miles

as DC Stephen Beam

Janet McTeer

as DS Amy Foster

Christine Tremarco

as Leanne Wellings