An FBI agent works with a refugee scientist and the Coast Guard to crack a Soviet spy ring in Boston.
| Directing | Alfred L. Werker | Director |
| Writing | Leo Rosten | Story |
| Writing | Leo Rosten | Screenplay |
| Writing | J. Edgar Hoover | Writer |
| Production | Louis De Rochemont | Producer |
| Sound | Louis Applebaum | Original Music Composer |
| Camera | Joseph C. Brun | Director of Photography |
| Editing | Angelo Ross | Editor |
| Camera | Edward Horton | Camera Operator |
| Camera | George Stoetzel | Camera Operator |
| Art | Herbert Andrews | Art Direction |
| Sound | Lodge Cunningham | Sound |
| Editing | Peter Ratkevich | Assistant Editor |
| Production | Thomas Whitesell | Unit Manager |
| Production | Shirlee Weingarten | Casting Director |
| Sound | Jack Shaindlin | Music Director |
| Production | Borden Mace | Associate Producer |
| Production | Lothar Wolff | Associate Producer |
