John Gregson
— Tony Hudson
Cecil Parker
— Dudley Partridge
June Thorburn
— Jane Hudson
Keith Michell
— Harry Bell
Elvi Hale
— Ann
Avice Landone
— Valerie Partridge
Jacques Brunius
— Monsieur Charbonnier
Gabrielle Brune
— Mary
Charles Clay
— Sir Harold Brazier
Betty Stockfeld
— Lady Brazier
Michael E. Briant
— Paul
Pauline Drewett
— Susan
John Harvey
— First Officer
Clement Freud
— Croupier (uncredited)
Beth Rogan
— (uncredited)