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.
| Production | Jerry Wald | Producer |
| Production | Jack L. Warner | Executive Producer |
| Camera | Bert Glennon | Director of Photography |
| Editing | Christian Nyby | Editor |
| Costume & Make-Up | Perc Westmore | Makeup Artist |
| Sound | Robert B. Lee | Sound Director |
| Crew | Lawrence W. Butler | Special Effects |
| Crew | Willard Van Enger | Special Effects |
| Directing | Delmer Daves | Director |
| Writing | Steve Fisher | Story |
| Sound | Leo F. Forbstein | Music Director |
| Sound | Leonid Raab | Orchestrator |
| Directing | Arthur Lueker | Assistant Director |
| Sound | Franz Waxman | Original Music Composer |
| Writing | Delmer Daves | Screenplay |
| Writing | Albert Maltz | Screenplay |
| Art | Leo K. Kuter | Art Direction |
| Camera | Ed Henderson | Still Photographer |
