Nikki Amuka-Bird PC Simone Farnes Actor Hugh Bonneville DSI Iain Barclay Actor Charlie Creed-Miles DC Stephen "Jim" Beam Actor Philip Davis Actor Patrick Malahide John Poole Actor Janet McTeer DS Amy Foster Actor David Oyelowo Matt Wellings Actor Sarah Smart Sarah Wheeler Actor Penelope Wilton Barbara Poole Actor Edward Woodward Victor Marsham Actor Otto Bathurst Director Simon Curtis Director, Executive Producer Hilary Salmon Executive Producer Gwyneth Hughes Writer