During World War II, Captain Cassidy and his crew of submariners are ordered into Tokyo Bay on a secret mission. They are to gather information in advance of the planned bombing of Tokyo. Along the way, the crew learn about each other as they face the enemy and some of them lose their lives.
| Costume & Make-Up | Perc Westmore | Makeup Artist |
| Writing | Steve Fisher | Story |
| Crew | Lawrence W. Butler | Special Effects |
| Crew | Willard Van Enger | Special Effects |
| Production | Jack L. Warner | Executive Producer |
| Sound | Robert B. Lee | Sound Director |
| Directing | Delmer Daves | Director |
| Production | Jerry Wald | Producer |
| Camera | Bert Glennon | Director of Photography |
| Editing | Christian Nyby | Editor |
| Directing | Arthur Lueker | Assistant Director |
| Sound | Franz Waxman | Original Music Composer |
| Sound | Leonid Raab | Orchestrator |
| Sound | Leo F. Forbstein | Music Director |
| Writing | Albert Maltz | Screenplay |
| Writing | Delmer Daves | Screenplay |
| Art | Leo K. Kuter | Art Direction |
| Camera | Ed Henderson | Still Photographer |
