Guest Stars Derek Riddell as Pete Shawe Owain Arthur as DI Sean Memory Kate Ashfield as Yvonne Fulcher Peter Wight as Charlie Edwards Jessica D'Arcy as Lora O'Callaghan Jake Davies as Liam O'Callaghan Dominic Tighe as DS Bob Cooper Ian Puleston-Davies as Mick O'Callaghan Faye McKeever as Deborah Peach Rufus Gerhardt-Williams as Aiden O'Callaghan Charlie Cooper as Kevin Reape Maimie McCoy as DC Tracy Joyce Anna Wilson-Jones as Jackie Stephanie Hyam as Becky Godden-Edwards Christopher Fulford as John Godden Simone Lahbib as Debbie Emma Clifford as Annette Daniel Betts as ACC Mike Veale Darcy Vanhinsbergh as Steven Edwards Orla Hill as Jennifer Fulcher Florence Howard as Sian O'Callaghan David Biscoe as Bevan Keir Charles as Robert Buckland MP Lolly Jones as Kelly Golda Rosheuvel as Forensic Witness Rachel Shenton as Emma Jim Piddock as Judge Griffith Williams Jonathan Aris as Ian Harris Dominique Moore as Miss X Lucy Briggs-Owen as Samantha Corrin Jo Stone-Fewings as Nicholas Haggan QC