James Mason
— Captain Brett Aimsley
John Mills
— Lt. Col. Clifford Southey
Herbert Lom
— Chong Sing
Rosenda Monteros
— Belle Annie
Roy Kinnear
— Capt. Enderby
Claude Dauphin
— Henri Farengue
Jacques Marin
— Desmoulins
Libby Morris
— Adele Franklin
Madge Ryan
— Millie Brooks
Gary Cockrell
— Joey
Peter Barkworth
— Lt. David Harper
Noel Harrison
— Junior Lieutenant (uncredited)