Guest Stars Karima McAdams as Miriam Attar Anna Berentzen as Young Emma Brooke Haynes as Emma Age 6 James Eeles as Mike Christine Bottomley as Jenna Brooks Jack Hollington as Jason Peterson Cathy Murphy as Beth Simms Colin Stinton as Jack Kretchmer Ben Cartwright as Phil Simms Anna Shaffer as Leila Catherine Steadman as Karen Buxton Brendan Patricks as DCI Nicholas Staines James Thorne as Derek Peterson Sam Crane as Luke Priyanga Burford as Zeinab Akbari Carol Plant as Female Prison Officer Elizabeth Conboy as Supervisor Sammy Winward as Siobhan Murphy Suzette Llewellyn as Delilah Hamlin Richard Simons as SO15 Tech Simon Hepworth as Oliver Jones Lara Cazalet as Janice Long
