Sly and dry intelligence agent Harry Palmer is tasked with investigating British Intelligence security, and is soon enmeshed in a world of double-dealing, kidnap and murder when he finds a traitor operating at the heart of the secret service.
| Directing | Sidney J. Furie | Director |
| Production | Harry Saltzman | Producer |
| Writing | W.H. Canaway | Screenplay |
| Writing | Len Deighton | Novel |
| Camera | Otto Heller | Director of Photography |
| Writing | James Doran | Screenplay |
| Sound | John Barry | Original Music Composer |
| Production | Denis Johnson | Production Manager |
| Production | Charles D. Kasher | Executive Producer |
| Production | Ronald Kinnoch | Associate Producer |
| Production | Weston Drury Jr. | Casting |
| Costume & Make-Up | Philip Leakey | Makeup Artist |
| Editing | Peter R. Hunt | Editor |
| Art | Peter Murton | Art Direction |
| Art | Ken Adam | Production Design |
| Directing | Pat Moon | Continuity |
| Costume & Make-Up | Muriel Dickson | Wardrobe Master |
| Sound | Nicholas Stevenson | Assistant Sound Editor |
| Sound | Peter T. Davies | Sound Mixer |
| Camera | George Courtney Ward | Still Photographer |
| Production | Ross MacKenzie | Location Manager |
| Sound | Maurice Askew | Sound Mixer |
| Camera | John Morgan | Focus Puller |
| Art | Michael White | Set Dresser |
| Camera | Brian Elvin | Camera Operator |
| Sound | Norman Wanstall | Sound Editor |
| Sound | Ben Rayner | Sound Editor |
| Costume & Make-Up | Barbara Ritchie | Hairdresser |
| Sound | John Barry | Conductor |
| Directing | Fred Slark | Assistant Director |
