- Peter Lawford
- Capt. Dion Lenbridge / Pvt. Harry Simms
- Richard Greene
- Capt. Thomas Garron
- Janice Rule
- Jane Wensley
- Leo G. Carroll
- Col. Henry Lenbridge
- John Abbott
- Herbert Bielensen
- Patrick Aherne
- Maj. Wensley
- John Dodsworth
- Maj. MacStreet
- Herbert Deans
- Prosecutor
- Hayden Rorke
- Maj. Fallow
- John Lupton
- Lt. Jersey
- Barry Bernard
- Sergeant
- Charles Davis
- Cpl. Biggs
- Jack Raine
- Gen. Woodberry
- Richard Hale
- Igor - Russian Emissary
- Michael Pate
- Crane
- Skelton Knaggs
- Fish
- Sean McClory
- McGinty
- Otto Waldis
- Alex
- Hugh French
- Capt. Foster
- Leslie Denison
- Lt. Col. Harvill
- Lester Matthews
- Brigadier General
- Guy Bellis
- Man from Scotland Yard
- Francis Bethencourt
- Captain Morton
- Chet Brandenburg
- Man in Crowd at Pier / Citizen Spectator at Court-Martial (uncredited)
- Bruce Carruthers
- Captain
- Wallis Clark
- Brooks - Bill Collector
- Tom Coleman
- Soldier on Ship
- Pat Conway
- Lieutenant
- Clyde Cook
- Fisherman
- Harry Cording
- Fish Cleaner
- James Craven
- Detective Renford
- Eddie Das
- Souvenir Wallah
- Alexis Davidoff
- Hassan Khan
- Vernon Downing
- Military Policeman
- David Dunbar
- Sgt. Major
- Gregory Gaye
- Russian Spy Chief
- Arthur Gould-Porter
- Mr. Paul - the Orderly
- Robert Haines
- Officer at Dance
- Charlie Hall
- Batman
- Lumsden Hare
- President
- Sam Harris
- Restaurant Diner
- Steve Hayes
- Orderly
- Ivo Henderson
- Provost Marshall
- Ramsay Hill
- British Colonel
- Stuart Holmes
- Member of Court Martial Board
- Robin Hughes
- Captain Ashe
- Aram Katcher
- Card Wallah
- Charles Keane
- Recruiting Sergeant
- Kenner G. Kemp
- C Company Leader
- Colin Kenny
- Officer at Dance
- Guy Kingsford
- Sentry
- Henry Kulky
- Russian Fisherman-Spy
- Sidney Lawford
- General
- Bruce Lester
- Wilson
- Carl M. Leviness
- Officer at Dance
- Harry Martin
- Sergeant
- Frank McLure
- Officer at Dance
- Clive Morgan
- Major
- John O'Malley
- Recruiting Corporal
- Patrick O'Moore
- Major Bennett
- Blake Owensmith
- Colonel Tyson
- Norman Rainey
- Tobacconist
- Chanan Singh Sohi
- Candy Wallah
- Kalu K. Sonkur
- Fruit Wallah
- Phyllis Stanley
- Mabel
- Bert Stevens
- Officer at Dance
- Robert Stevenson
- Signaler
- Elaine Stewart
- Nurse
- Gilchrist Stuart
- Andy
- Brick Sullivan
- Man in Crowd on Pier
- Trevor Ward
- Bank Teller
- Nelson Welch
- Interpreter
- Wilson Wood
- Sentry
