Paapa Essiedu Stephen Actor Siobhan Cullen Lisa Actor Charlotte Riley Amanda Actor Jack Bannon Dave Actor Amy Trigg Rachel Actor Edie Lambden Hotel Receptionist Actor Ryan McKen Matt Actor Elizabeth Collins Kitty Actor Tia Bannon Katie Actor Jay Simpson Ralph Actor Stefan Golaszewski Executive Producer, Director Ruth Kenley-Letts Executive Producer Richard Laxton Executive Producer Neil Blair Executive Producer Lyndsay Robinson Producer Kelly Duffell Producer