Andrew Douglas Director, Executive Producer Jamie Blackley Mark Actor Toby Regbo John Actor Joanne Froggatt Detective Inspector Sarah Clayton Actor Liz White Janet Actor Jaime Winstone Rachel Actor Mark Womack Mark's Dad Actor Amy Wren Zoey Actor Louise Delamere Mark's Mum Actor James Burrows Ryan Robins Actor Stephanie Leonidas Kelly Actor Mike Walden Screenwriter Lenny Beckerman Executive Producer Paul Green Executive Producer Marc Berliner Executive Producer Steve Golin Producer Peter Heslop Producer Bryan Singer Producer Simon Crocker Producer Jon Hopkins Original Music Tim Wooster Cinematographer Michael Elliot Film Editing Elaine Grainger Casting Lucinda Syson Casting Paul Cripps Production Design Astrid Sieben Art Director Zoe Hoare Set Decoration Caroline Harris Costume Design