Jack HawkinsSupt Tom Halliday John StrattonSergeant Ward Dorothy AlisonMary Halliday Michael BrookeTony Halliday Sam KyddPolice Constable in Information Room Glyn HoustonDetective Sergeant in 'Q' car Richard LeechNightwatchman / Gilson Newton BlickDeputy Commander Geoffrey KeenChief Superintendent Jim Malcolm Arthur RigbyDetective Inspector at Chester Ralph TrumanColonel Blenkinsop Ian BannenThe Young Workman - Stanley James Maureen DavisThe Young Workman's Wife - Mrs. James John WarwickDetective Inspector at Shipping Office Joss AmblerCashier at Shipping Office Barry KeeganDetective Constable in Hospital Ward Alec McCowenHouse Surgeon Harry LockeSecondhand Dealer Nicholas ParsonsPolice Constable Bates Warwick AshtonNewspaper Circulation Manager Ursula HowellsMrs. Elliot / Mrs. Gilson David DaviesWelsh Police Constable Julie MiltonWelsh Newsagent's Daughter Meredith EdwardsMr. Thomas Harold GoodwinOfficial at Somerset House John WelshHouse Agent at Shepperton Gillian WebbHousewife at Shepperton Maureen DelaneyMrs. Stevens, the daily help Jameson ClarkDetective Superintendent Ogilvie William MervynManager of Festival Hall Vincent BallP.C. at Hospital (uncredited) Richard DaviesDetective (uncredited) Frazer HinesUrchin (uncredited) Stratford JohnsConstable (uncredited) David LodgeDetective at Car Lot (uncredited) Guy StandevenDetective (uncredited) Frederick TrevesDetective tailing Creasey (uncredited) Peter WelchCID Man (uncredited) Martin WyldeckOfficer in Criminal Records Department (uncredited) John WilderDetective (uncredited) Thomas N. Morahanアソシエイトプロデューサー Edward CarrickArt Direction Gordon DinesDirector Of Photography Harry FramptonMakeup Artist Anthony MendlesonCostume Design Gerard Schurmannオリジナルの作曲者 
