Gregory Peck as Col. Lewis Pugh

Roger Moore as Capt. Gavin Stewart

David Niven as Col. W.H. Grice

Trevor Howard as Jack Cartwright

Barbara Kellerman as Mrs. Cromwell

Patrick Macnee as Major 'Yogi' Crossley

Kenneth Griffith as Charlie Wilton

Patrick Allen as Colin Mackenzie

Wolf Kahler as Trompeta

Robert Hoffmann as U-Boat Captain

Dan van Husen as U-Boat First Officer

George Mikell as Captain of Ehrenfels

Jürgen Andersen as First Officer of Ehrenfels

Bernard Archard as Underhill

Martin Benson as Mr. Montero

Percy Herbert as Dennison

Donald Houston as Hilliard

Glyn Houston as Peters

Terence Longdon as Malvern

Allan Cuthbertson as Dickie Melborne

Faith Brook as Mrs Doris Grice

John Standing as Finley

Graham Stark as Don Manners

Jack Watson as Maclean

Moray Watson as Breen

Michael Medwin as Langley

William Morgan Sheppard as 'Patch' Lovecroft

Patrick Holt as Barker

Clifford Earl as Sloane

Keith Stevenson as Manuel

Brook Williams as Butterworth

Victor Langley as Williamson

Marc Zuber as Ram Das Gupta

Mohan Agashe as Brothel Keeper