Kenneth More as Captain Jonathan Shepard

Dana Wynter as WRNS Second Officer Anne Davis

Carl Möhner as Captain Lindemann - 'Bismarck'

Laurence Naismith as First Sea Lord Admiral Sir Dudley Pound

Geoffrey Keen as Assistant Chief of the Naval Staff (A.C.N.S.)

Karl Stepanek as Admiral Lutjens - 'Bismarck'

Michael Hordern as Admiral Sir John Tovey, Commander-in-Chief - 'King George'

Maurice Denham as Commander Richards

Michael Goodliffe as Captain Banister

Esmond Knight as Captain Leach - 'Prince of Wales'

Jack Watling as RNVR Signals Officer

Jack Gwillim as Captain Wilfrid Patterson - 'King George V'

Mark Dignam as Captain Maund - 'Ark Royal'

Ernest Clark as Captain Ellis - 'Suffolk'

John Horsley as Captain - 'Sheffield'

Peter Burton as Captain Philip Vian - 4th Destroyer of Flotilla

John Stuart as Captain Kerr - 'Hood'

Walter Hudd as Admiral Holland - 'Hood'

Sydney Tafler as Henry - First Workman, 'Prince of Wales'

Sean Barrett as Able Seaman Brown

Thomas Waldron Price as Flag Lieutenant to First Sea Lord

Edward R. Murrow as Himself - Edward R. Murrow

John Stride as Tom Shepard, Captain Shepard's son, TAG - Ark Royal's Swordfish Squadron (uncredited)

Peter Dyneley as Commander Jenkins (uncredited)

Victor Maddern as Able Seaman Outside Admiralty (uncredited)

David Hemmings as Seaman - 'Ark Royal' (uncredited)

Johnny Briggs as Seaman - 'Prince of Wales' (uncredited)

Norman Shelley as Voice of Winston Churchill (uncredited)

John Barron as Officer P.R.O (uncredited)

Harold Goodwin as Airman on Phone (uncredited)

Walter Gotell as Signals Officer Mueller on the 'Bismarck' (uncredited)

Sam Kydd as Civilian Worker - 'Prince of Wales' (uncredited)

Glyn Houston as Able Seaman - 'Prince of Wales' (uncredited)

Cameron Hall as Civilian Worker - 'Prince of Wales' (uncredited)

Peter Forbes-Robertson as Signalman - 'Prince of Wales' (uncredited)

Michael Ripper as Able Seaman - Lookout on 'Suffolk' (uncredited)

Michael Balfour as Able Seaman - Lookout on 'Suffolk' (uncredited)

Graham Stark as Petty Officer Williams (uncredited)

Olaf Pooley as Officer of the Watch - 'Sheffield' (uncredited)

Edwin Richfield as Bridge Officer (uncredited)

George Pravda as Damage Control Officer - Bismarck (uncredited)

Russell Napier as Air Vice Marshal (uncredited)

Edward Judd as Navigating Officer - 'Prince of Wales' (uncredited)

Bernard Lee as Firing Officer (uncredited)

Robert Brown as Gunnery Officer - 'King George V' (uncredited)

Max Butterfield as Dark Room Technician (uncredited)

Mark Burns as Naval Rating on Phone (uncredited)

Roy Castle as Able Seaman - 'Prince of Wales' (uncredited)

Victor Beaumont as Officer - 'Bismarck' (uncredited)

Richard Beale as Petty Officer on Phone (uncredited)

Donald Churchill as Able Seaman - 'Ark Royal' (uncredited)

Peter Cellier as First Lieutenant - Destroyer (uncredited)

Charles Houston as Airman - 'Ark Royal' (uncredited)

Patrick Jordan as SOE Agent in Norway (uncredited)

Ronald Leigh-Hunt as Somers - Officer 'King George V' (uncredited)

Hugh Latimer as Commander - War Room (uncredited)

Sean Lynch as Mail Clerk - 'Ark Royal' (uncredited)

Julian Somers as Civilian Worker - 'Prince of Wales' (uncredited)

Michael Sarne as Hoffman - 'Bismarck' (uncredited)

Robert Desmond as Dexter (uncredited)

John Bailey as Naval Officer (uncredited)

Michael Collins as Lookout - Second Destroyer (uncredited)

John G. Heller as Lt. Becker on the 'Bismarck' (uncredited)

Ian Hendry as Meteorological Officer on 'King George V' (uncredited)

Ronald Hines as Officer on Bridge of 'Prince of Wales' (uncredited)