 Clark GableCmdr. Richardson | Cmdr. Richardson |
 Burt LancasterLt. Jim Bledsoe | Lt. Jim Bledsoe |
 Jack WardenYeoman 1st Class Mueller | Yeoman 1st Class Mueller |
 Brad DexterCartwright | Cartwright |
 Don RicklesQuartermaster 1st Class Ruby | Quartermaster 1st Class Ruby |
 Nick CravatRusso | Russo |
 Joe MarossKohler | Kohler |
 Mary LaRocheLaura Richardson | Laura Richardson |
 Eddie Foy IIILarto | Larto |
 Rudy BondSonarman 1st Class Cullen | Sonarman 1st Class Cullen |
| JJimmy BatesJessie (uncredited) | Jessie (uncredited) |
 Joel FluellenBragg (uncredited) | Bragg (uncredited) |
 Ken LynchFrank (uncredited) | Frank (uncredited) |
 H.M. WynantCorpsman Hendrix (uncredited) | Corpsman Hendrix (uncredited) |
 Teru ShimadaJapanese Submarine Commander (uncredited) | Japanese Submarine Commander (uncredited) |
 Skip WardMinor Role (uncredited) | Minor Role (uncredited) |
 Russell ThorsonSubmarine Crewman (uncredited) | Submarine Crewman (uncredited) |
| RRodger TerryCrewman (uncredited) | Crewman (uncredited) |
| MMaurice McEndreeRadio Operator (uncredited) | Radio Operator (uncredited) |
 Alexander LockwoodMinor Role (uncredited) | Minor Role (uncredited) |
 Dale IshimotoJapanese sailor (uncredited) | Japanese sailor (uncredited) |
| JJohn GibsonCapt. Blunt (uncredited) | Capt. Blunt (uncredited) |
| JJohn CloseCo-ordinate Fixer at Bungo Straits (uncredited) | Co-ordinate Fixer at Bungo Straits (uncredited) |
 John BryantCarl Beckman (uncredited) | Carl Beckman (uncredited) |
 David BakerCrew member (uncredited) | Crew member (uncredited) |
