Ray Milland
— Colley Dawson
Barry Jones
— Bennet Carfield
Jeanette Sterke
— Irene
Victor Maddern
— Morris
Ernest Clark
— Major Adbury
Barbara Everest
— Mrs. Dawson
Bernard Fox
— Shafter
Cyril Raymond
— Inspector Frankham
Melissa Stribling
— Angela
Percy Herbert
— Sergeant Harper
Anthony Nicholls
— General Prior
David Horne
— Herbert Fenwright
Colin Gordon
— Dakers
Clive Morton
— Sir George Turvey
John Welsh
— Inspector Owing
Pamela Stirling
— Belgian Messenger
Colin Tapley
— Colonel Charles Mercer
Henri Vidon
— Lonsen (as Henry Vidon)
Ian MacNaughton
— Thomson
Jackie Collins
— Fenwright's Secretary