Copenhagen, Denmark, 1962. When a high-ranking Soviet official decides to change sides, a French intelligence agent is caught up in a cold, silent and bloody spy war in which his own family will play a decisive role.
| Writing | Leon Uris | Novel |
| Sound | Maurice Jarre | Original Music Composer |
| Art | Henry Bumstead | Production Design |
| Directing | Alfred Hitchcock | Director |
| Production | Wallace Worsley Jr. | Unit Production Manager |
| Camera | Jack Hildyard | Director of Photography |
| Editing | William H. Ziegler | Editor |
| Writing | Samuel A. Taylor | Screenplay |
| Directing | Douglas Green | Assistant Director |
| Visual Effects | Albert Whitlock | Visual Effects |
| Sound | Maurice Jarre | Conductor |
| Sound | Robert Bertrand | Sound |
| Production | Herbert Coleman | Associate Producer |
| Costume & Make-Up | Larry Germain | Hairstylist |
| Costume & Make-Up | Bud Westmore | Makeup Artist |
| Crew | J. P. Mathieu | Technical Advisor |
| Directing | James A. Westman | Assistant Director |
| Directing | Trudy von Trotha | Script Supervisor |
| Camera | William Dodds | Camera Operator |
| Sound | Waldon O. Watson | Sound |
| Art | John P. Austin | Set Decoration |
| Costume & Make-Up | Nellie Manley | Hairstylist |
| Crew | Odette Ferry | Technical Advisor |
| Costume & Make-Up | Pierre Balmain | Costumer |
| Costume & Make-Up | Leonard Engelman | Makeup Artist |
| Crew | Hal Mohr | Technical Advisor |
| Costume & Make-Up | Peter V. Saldutti | Costume Supervisor |
| Costume & Make-Up | Edith Head | Costume Design |
