John Gregson

as Captain Bell - H.M.S. Exeter

Anthony Quayle

as Commodore Harwood - H.M.S. Ajax

Ian Hunter

as Captain Woodhouse - H.M.S. Ajax

Jack Gwillim

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

Bernard Lee

as Captain Dove - M.S. Africa Shell

Lionel Murton

as Mike Fowler

Anthony Bushell

as Sir Millington Drake, British Minister, Montevideo

Peter Illing

as Dr. Guani, Foreign Minister, Uruguay

Michael Goodliffe

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

Patrick Macnee

as Lieutenant Commander Medley, R.N.

John Chandos

as Dr. Langmann, German Minister, Montevideo

Douglas Wilmer

as M. Desmoulins, French Minister, Montevideo

William Squire

as Ray Martin

Roger Delgado

as Captain Varela, Uruguayan Navy

Andrew Cruickshank

as Captain Stubbs, 'Doric Star'

Christopher Lee

as Manolo

Edward Atienza

as Pop

April Olrich

as Dolores

Peter Finch

as Captain Langsdorff, "Admiral Graf Spee"

David Farrar

as Narrator

John Le Mesurier

as Reverend George Groves - Padre, HMS Exeter

Cyril Luckham

as Lieutenant Jasper Abbot, H.M.S. Achilles

George Murcell

as Chief Officer, Newton Beach

Anthony Newley

as Radio Operator, Tairoa, Prisoner on Admiral Graf Spee

Nigel Stock

as Chief Officer, Tairoa, Prisoner on Admiral Graf Spee

Barry Foster

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

Ambrosine Phillpotts

as Mrs. Millington-Drake, Montevideo

Tony Wager

as Lookout, HMS Ajax

Brian Worth

as Radio Operator, Doric Star, Prisoner on Graf Spee

Patrick Westwood

as Archer, HMS Ajax

Chris Adcock

as British Seaman (Prisoner on Graf Spee) (uncredited)

Michael Collins

as Chief Yeoman, HMS Ajax (uncredited)

Patrick Jordan

as Signalman, Aft-Conning, HMS Exeter (uncredited)

Jeremy Kemp

as Gunner, HMS Achilles (uncredited)

Donald Moffat

as Swanston - Lookout, HMS Ajax (uncredited)

John Schlesinger

as Lieutenant, Graf Spee (uncredited)

Richard Beale

as Capt. Pottinger (uncredited)

John Forbes-Robertson

as Lt. McBarnett, HMS Exeter (uncredited)