- Kenneth More
- Captain Jonathan Shepard
- Dana Wynter
- Second Officer Anne Davis
- Carl Möhner
- Kapitän Ernst Lindemann
- Laurence Naismith
- First Sea Lord - Sir Dudley Pound - Admiral of the Fleet
- Geoffrey Keen
- Assistant Chief of Naval Staff
- Karel Stepanek
- Admiral Günther Lutjens
- Michael Hordern
- Admiral Jack Tovey - Commander in Chief - HMS King George V
- Maurice Denham
- Commander Richards
- Michael Goodliffe
- Captain Banister
- Esmond Knight
- Captain John Leach - HMS Prince of Wales
- Jack Watling
- Signals Officer
- Jack Gwillim
- Commodore Wilfrid Patterson - HMS King George V
- Mark Dignam
- Captain Loben Mound - HMS Ark Royal
- Ernest Clark
- Captain Robert Ellis - HMS Suffolk
- John Horsley
- Captain Charles Larcom - HMS Sheffield
- Peter Burton
- Captain - HMS Solent - First Destroyer
- Sydney Tafler
- Henry - First Workman
- John Stuart
- Captain Ralph Kerr - HMS Hood
- Walter Hudd
- Admiral Lancelot Holland - HMS Hood
- Sean Barrett
- Able Seaman Brown
- Edward R. Murrow
- Edward R. Murrow
- Robert Arnold
- Fighter Pilot
- Peter Avella
- Bridge Officer [HMS Solent]
- John Bailey
- Naval Officer
- Del Baker
- Guard
- Michael Balfour
- Able Seaman - Lookout on 'Suffolk'
- John Barron
- Officer P.R.O.
- Richard Beale
- Petty Officer in Phone Montage
- Victor Beaumont
- Officer on the 'Bismarck'
- Josef Behrmann
- German Newsreader
- Michael Beint
- Lothar Balzar - Leutnant zur See
- Brandon Brady
- Signal Officer on the 'Ark Royal'
- Johnny Briggs
- Young Seaman on 'Prince of Wales'
- Anthony Brothers
- A naval officer
- Robert Brown
- Gunnery Officer on 'King George V'
- Robert Bruce
- Officer - RAF Operations Room
- Mark Burns
- Naval Rating in Phone Montage
- Max Butterfield
- Dark Room Technician
- Dennis Carnell
- Bridge Officer [HMS King George V]
- Roy Castle
- Seaman on 'Prince of Wales'
- Peter Cellier
- First Lieutenant on Destroyers
- Vic Chapman
- Bridge Officer (HMS King George V)
- Donald Churchill
- Seaman on 'Ark Royal'
- Michael Collins
- Lookout - Second Destroyer
- Eric Corrie
- Pilot - RAF Operations Room
- George Curtis
- War Room Officer
- Robert Desmond
- Dexter
- Peter Dyneley
- Jenkins - 'King George V'
- Clifford Elkin
- Pilot - RAF Operations Room
- John Flint
- Pilot - RAF Opeations Room
- Peter Forbes-Robertson
- Signalman - 'Prince of Wales'
- Tom Gill
- Master of the Fleet - 'King George V'
- Harold Goodwin
- Airman in Phone Montage
- Walter Gotell
- Signals Officer Mueller on the 'Bismarck'
- Kathryn Greenaway
- Miss Jackson - WRENS
- Pat Hagan
- Senior Officer - 'King George V'
- Cameron Hall
- Civilian Worker on 'Prince of Wales'
- John G. Heller
- Lt. Becker on the 'Bismarck'
- David Hemmings
- Seaman on 'Ark Royal'
- Ian Hendry
- Meteorological Officer on 'King George V'
- Jack Hetherington
- Senior Officer - 'King George V'
- Hubert Hill
- War Room Officer
- Ronald Hines
- Officer on Bridge of 'Prince of Wales'
- Adolf Hitler
- Self - at Launch of 'Bismarck'
- Alfred Hoffman
- Quartermaster - 'Bismarck'
- Charles Houston
- Airman - 'Ark Royal'
- Glyn Houston
- Seaman on 'Prince of Wales'
- Norman Johns
- Pilot - RAF Operations Room
- Patrick Jordan
- Agent in Norway
- Edward Judd
- Navigating Officer on 'Prince of Wales'
- Sam Kydd
- Civilian Worker on 'Prince of Wales'
- Eric Lander
- 'Swordfish' Pilot
- Hugh Latimer
- Commander - War Room
- Sheldon Lawrence
- NBC Newsreader
- Bernard Lee
- Firing Officer
- George Leech
- War Room Officer
- Ronald Leigh-Hunt
- Rear Admiral Somers - Officer on 'King George V'
- Harry Locke
- Undetermined Secondary Role
- Ned Lynch
- War Room Officer
- Sean Lynch
- Mail Clerk on 'Ark Royal'
- Barry MacGregor
- Midshipman - 'Prince of Wales'
- Fred Machon
- War Room Officer
- Victor Maddern
- Able Seaman, Final Scene
- Colin McKenzie
- Naval Rating
- Hugh Moxey
- Captain - Second Destroyer
- Russell Napier
- Air Vice Marshal
- Richard Neller
- War Room Officer
- Anthony Oliver
- Operations Officer on 'Ark Royal'
- Joe Phelps
- Naval Officer
- Olaf Pooley
- Officer of the Watch on 'Sheffield'
- George Pravda
- Damage Control Officer on the 'Bismarck'
- Robin Ray
- RAF Officer
- Edwin Richfield
- Bridge Officer
- Robert Rietty
- Captain Lindemann
- Michael Ripper
- Able Seaman - Lookout on 'Suffolk'
- George Roubicek
- Oberleutnant Hoffman
- Pat Ryan
- War Room Officer
- Michael Sarne
- Bridge Officer - 'Bismarck'
- Frederick Schiller
- Damage Control Officer
- Norman Shelley
- Winston Churchill
- Julian Somers
- Civilian Worker - 'Prince of Wales'
- Guy Standeven
- Yeoman on King George V
- Graham Stark
- Petty Officer Williams
- Gordon Sterne
- German Officer
- John Stride
- Tom Shepard - Gunner - 'Ark Royal' Air Gunner
- Fred Stroud
- War Room Officer
- Donald Tandy
- Air Commodore in Phone Montage
- Jack Taylor
- Undetermined Secondary Role
- Peter Taylor
- Korvettenkapitan Adalbert Schneider
- Reg Thomason
- Officer - HMS Sheffield
- Noel Trevarthen
- Pilot - RAF Operations Room
- Ernst Walder
- German Rating - 'Bismarck'
- John H. Watson
- Officer - 'King George V'
- Ian Whittaker
- Able Seaman - Final Scene
- Brian Worth
- Torpedo Control Officer on First Destroyer
