Debbie Isitt Director, Writer Martin Freeman Matt Actor Jessica Hynes Sam Actor Stephen Mangan Josef Actor Meredith MacNeill Isabelle Actor Robert Webb Michael Actor Olivia Colman Joanna Actor Vincent Franklin Archi Heron Actor Jason Watkins Gregory Hough Actor Jimmy Carr Antony Actor Felicity Montagu Vivien Kay-Wylie Actor Alison Steadman Sam's Mum Actor Marc Wootton Snoopy Actor Sarah Hadland Jen Actor Ron Cook Sam's Dad Actor Ian Flooks Producer Ian Benson Producer Dewald Aukema Cinematographer Nicky Ager Film Editor Chris Roope Production Design David M. Thompson Executive Producer Lee Thomas Executive Producer Andrew Taylor Executive Producer Oliver Edwards Executive Producer Joe Oppenheimer Executive Producer Paul Englishby Original Music Freddy Evard Art Director Deirdre Clancy Costume Design