Guest Stars Karima McAdams as Miriam Attar Anna Berentzen as Young Emma James Eeles as Mike Brooke Haynes as Emma Age 6 Rick Warden as Charlie Simms Colin Stinton as Jack Kretchmer Ben Cartwright as Phil Simms Cathy Murphy as Beth Simms Brendan Patricks as DCI Nicholas Staines James Thorne as Derek Peterson Priyanga Burford as Zeinab Akbari Sam Crane as Luke Tim Fellingham as Nathan Isnardi Jonah Lotan as Logan Bradley Brian Caspe as Joel Fugard David Menkin as Sergeant Marcus David Alexander as Ed Lacy Tom Mannion as Carl Enfield