Ray Milland Colley Dawson Director, Actor Barry Jones Bennett Carfield Actor Victor Madden Morris Actor Ernest Clark Major Adbury Actor Cyril Raymond Inspector Frankham Actor Melissa Stribling Angela Actor Percy Herbert Sergeant Harper Actor Barbara Everest Mrs. Dawson Actor Anthony Nicholls General Prior Actor David Horne Herbert Fenwright Actor Colin Gordon Dakers Actor Clive Morton Sir George Turvey Actor John Welsh Inspector Owing Actor Pamela Stirling Belgian Messenger Actor Colin Tapley Colonel Charles Mercer Actor Henry Vidon Lonsen Actor Ian MacNaughton Thomson Actor Bernard Fox Shafter Actor Richard Shaw Bailey Actor Charles Lloyd Pack Lambert Actor Barry Keegan Squadron Leader Hawkes Actor Sam Kydd McCullers Actor Ferdy Mayne Greek Ship Owner Actor Jackie Collins Fenwright's Secretary Actor