Uncredited Heather Cave as Maisie Simm Ray Panthaki as Chalak Ahmed Ralph Ineson as Sam Walker Kevork Malikyan as Ozan Cosar Katie Jones as Leyla Ahmed Jeremy Bulloch as Roger Welks Christopher Fulford as Johnny Marks Steve Garti as Stan Fisun Burgess as Selin Cozar Oliver Haden as Sonay Alkan Beth Vyse as Tara Welks Karzan Krekar as Serka