Patrick Macnee
(Lieutenant Commander Medley R.N.),
Peter Finch
(Captain Langsdorff - 'Admiral Graf Spee'),
Jack Gwillim
(Captain Parry - H.M.N.Z.S. Achilles),
Anthony Bushell
(Mr. Millington Drake - British Minister, Montevideo),
John Chandos
(Dr. Langmann - German Minister, Montevideo),
Michael Goodliffe
(Captain McCall - R.N., British Naval Attache, Buenos Aires),
John Gregson
(Captain Bell - H.M.S. Exeter),
Ian Hunter
(Captain Woodhouse - H.M.S. Ajax),
Peter Illing
(Dr. Guani - Foreign Minister, Uruguay),
Bernard Lee
(Captain Dove - M.S. Africa Shell),
Lionel Murton
(Mike Fowler),
Anthony Quayle
(Commodore Harwood-H.M.S. Ajax),
William Squire
(Ray Martin),
Douglas Wilmer
(M. Desmoulins - French Minister, Montevideo),
H.M.S. Sheffield
(H. M. S. Ajax),
I.N.S. Delhi
(H.M.N.Z.S. Achilles),
H.M.S. Jamaica
(H.M.S. Exeter),
H.M.S. Cumberland
(H.M.S. Cumberland)