The crew of the American destroyer escort, the USS Haynes, detects a German U-Boat—resulting in a prolonged, deadly battle of wits.
| Directing | Dick Powell | Director |
| Production | Dick Powell | Producer |
| Writing | Wendell Mayes | Screenplay |
| Writing | D.A. Rayner | Novel |
| Editing | Stuart Gilmore | Editor |
| Art | Lyle R. Wheeler | Art Direction |
| Art | Fay Babcock | Set Decoration |
| Art | Albert Hogsett | Art Direction |
| Sound | Leigh Harline | Original Music Composer |
| Camera | Harold Rosson | Director of Photography |
| Art | Walter M. Scott | Set Decoration |
| Costume & Make-Up | Charles LeMaire | Costume Design |
| Costume & Make-Up | Ben Nye | Makeup Artist |
| Directing | Arthur Lueker | Assistant Director |
| Sound | Walter Rossi | Sound Effects |
