Guest Stars Derek Riddell as Pete Shawe Kate Ashfield as Yvonne Fulcher Owain Arthur as DI Sean Memory Peter Wight as Charlie Edwards Jessica D'Arcy as Lora O'Callaghan Jake Davies as Liam O'Callaghan Faye McKeever as Deborah Peach Dominic Tighe as DS Bob Cooper Ian Puleston-Davies as Mick O'Callaghan Rufus Gerhardt-Williams as Aiden O'Callaghan Charlie Cooper as Kevin Reape Maimie McCoy as DC Tracy Joyce Stephanie Hyam as Becky Godden-Edwards Anna Wilson-Jones as Jackie Simone Lahbib as Debbie Christopher Fulford as John Godden 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