Olivia Colman Susan Edwards Actor, Executive Producer David Thewlis Christopher Edwards Actor Samuel Anderson DC Paul Wilkie Actor Felicity Montagu Patricia Wycherley Actor Karl Johnson Actor Kate O'Flynn DC Emma Lancing Actor Dipo Ola Douglas Hylton Actor Daniel Rigby DCI Tony Collier Actor Will Sharpe Executive Producer, Director Jane Featherstone Executive Producer Chris Fry Executive Producer Ed Sinclair Executive Producer, Writer