James Mason
— Robert Leyland
Viki Dobson
— Barbara Standish
Eddie Pola
— 'Terrible' Tony Canzari
Finlay Currie
— Al Parson
John Warwick
— Eddie 'Babyface' Fallon
Margaret Rutherford
— 'Crafty' Maggie Carberry
Paul Blake
— Cornwallis
James Mageean
— Ben
Eva Hudson
— Manzanilla
Paul Sheridan
— Fournival
Peter Popp
— Bertram Plush
Bernard Merefield
— Mr Lowry, Ship's Purser
Charles Sewell
— Ship's Captain
Zoe Wynn
— Lenore Kendall
Jack Lester
— Superintendent Welbekker