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Trevor Howard
Harry Scobie

Elizabeth Allan
Louise Scobie

Denholm Elliott
Wilson

Peter Finch
Father Rank

Maria Schell
Helen Rolt

Gérard Oury
Yusef

George Coulouris
Portuguese Captain

Michael Hordern
Commissioner

Jane Henderson
Miss Malcot (uncredited)

Earl Cameron
Ali

Judith Furse
Dr Sykes