John Gregson

Captain Bell - H.M.S. Exeter

Anthony Quayle

Commodore Harwood - H.M.S. Ajax

Ian Hunter

Captain Woodhouse - H.M.S. Ajax

Jack Gwillim

Captain Parry - H.M.N. Z. S. Achilles

Bernard Lee

Captain Dove - M.S. Africa Shell

Lionel Murton

Mike Fowler

Anthony Bushell

Sir Millington Drake, British Minister, Montevideo

Peter Illing

Dr. Guani, Foreign Minister, Uruguay

Michael Goodliffe

Captain McCall, R.N., British Naval Attache, Buenos Aires

Patrick Macnee

Lieutenant Commander Medley, R.N.

John Chandos

Dr. Langmann, German Minister, Montevideo

Douglas Wilmer

M. Desmoulins, French Minister, Montevideo

William Squire

Ray Martin

Roger Delgado

Captain Varela, Uruguayan Navy

Andrew Cruickshank

Captain Stubbs, 'Doric Star'

Christopher Lee

Manolo

Edward Atienza

Pop

April Olrich

Dolores

Peter Finch

Captain Langsdorff, "Admiral Graf Spee"

David Farrar

Narrator

Jeremy Kemp

Gunner, H.M.S. Achilles (uncredited)

John Le Mesurier

Reverend George Groves - Padre, HMS Exeter

Cyril Luckham

Lieutenant Jasper Abbot, H.M.S. Achilles

Donald Moffat

Swanston, Lookout, H.M.S. Ajax (uncredited)

George Murcell

Chief Officer, Newton Beach

Anthony Newley

Radio Operator, Tairoa, Prisoner on Admiral Graf Spee

Nigel Stock

Chief Officer, Tairoa, Prisoner on Admiral Graf Spee

Barry Foster

Bill Roper - Capt. Bell's Messenger, HMS Exeter

Ambrosine Phillpotts

Mrs. Millington-Drake, Montevideo

Tony Wager

Lookout, HMS Ajax

Brian Worth

Radio Operator, Doric Star, Prisoner on Graf Spee

Patrick Westwood

Archer, HMS Ajax

Chris Adcock

British Seaman (Prisoner on Graf Spee) (uncredited)

Michael Collins

Chief Yeoman, HMS Ajax (uncredited)

Patrick Jordan

Signalman, Aft-Conning, HMS Exeter (uncredited)

Jeremy Kemp

Gunner, HMS Achilles (uncredited)

Donald Moffat

Swanston - Lookout, HMS Ajax (uncredited)

John Schlesinger

Lieutenant, Graf Spee (uncredited)

Richard Beale

Capt. Pottinger (uncredited)

John Forbes-Robertson

Lt. McBarnett, HMS Exeter (uncredited)