Carl Tibbetts Director, Screenwriter Cillian Murphy Martin Actor Jamie Bell Jack Actor Thandiwe Newton Kate Actor Jimmy Yuill Doug Actor Marilyn Mantle Mrs. Doug Actor Janice Hallett Screenwriter Simon Crowe Executive Producer David Frost Executive Producer Jacqueline Kerrin Executive Producer Jan Pace Executive Producer Dominic Wright Executive Producer Ilan Eshkeri Original Music Chris Seager Cinematographer Jamie Trevill Film Editing Louise Page Costume Design Michael Rosenberg Executive Producer