Anna Friel Marcella Actor Laura Carmichael Maddy Stevenson Actor Nicholas Pinnock Jason Backland Actor Ian Puleston-Davies Peter Cullen Actor Nina Sosanya DCI Laura Porter Actor Ray Panthaki DI Rav Sangha Actor Jamie Bamber DI Tim Williamson Actor Sinead Cusack Sylvie Gibson Actor Harry Lloyd Henry Gibson Actor Nathalie Armin Helen Actor Maeve Dermody Grace Gibson Actor Sophia Brown Dc Leann Hunter Actor Jack Doolan DC Mark Travis Actor Victoria Smurfit Maya Whitman Actor Harriet Cains Gail Davidson Actor Vivienne Gibbs Dr. Lewis Actor Keith Allen Alan Summers Actor Nigel Planer Reg Reynolds Actor Asher Flowers Edward Backland Actor Andrew Tiernan Nigel Stafford Actor Charles Martin Director Hans Rosenfeldt Writer Charles Sturridge Director Ann Harrison-Baxter Producer Camilla Ahlgren Writer