Directed by
| George Pollock | ||
Writing Credits
| Peter Yeldham | ... | (screenplay) and |
| Harry Alan Towers | ... | (screenplay) (as Peter Welbeck) |
| Agatha Christie | ... | (novel) (uncredited) |
Cast (in credits order) verified as complete
| Hugh O'Brian | ... | Hugh Lombard | |
| Shirley Eaton | ... | Ann Clyde | |
| Fabian | ... | Mike Raven | |
| Leo Genn | ... | General Mandrake | |
| Stanley Holloway | ... | William Blore | |
| Wilfrid Hyde-White | ... | Judge Cannon (as Wilfrid Hyde White) | |
| Daliah Lavi | ... | Ilona Bergen | |
| Dennis Price | ... | Dr. Armstrong | |
| Marianne Hoppe | ... | Frau Grohmann | |
| Mario Adorf | ... | Herr Grohmann | |
| Rest of cast listed alphabetically: | |||
 |
Bill Mitchell | ... | Narrator (voice) |
| Christopher Lee | ... | Mr. U. N. Owen (voice) (uncredited) | |
Produced by
| Harry M. Popkin | ... | producer: in association with |
| Harry Alan Towers | ... | producer |
| Oliver A. Unger | ... | executive producer (uncredited) |
Music by
| Malcolm Lockyer | ||
Cinematography by
| Ernest Steward | ... | (cameraman) |
Editing by
| Peter Boita | ||
Art Direction by
| Frank White | ||
Makeup Department
| Anne Box | ... | hairdresser (as Ann Box) |
| Gerry Fletcher | ... | makeup artist |
Production Management
| John Comfort | ... | production manager |
| Frank White | ... | unit production manager (uncredited) |
Second Unit Director or Assistant Director
| Barrie Melrose | ... | assistant director |
Sound Department
| John Brommage | ... | sound mixer |
| Ken Cameron | ... | sound mixer |
| Peter Keen | ... | sound editor |
| Terry Sharratt | ... | boom operator (uncredited) |
Stunts
| Larry Taylor | ... | stunt double: Mario Adorf (uncredited) |
| Terry Yorke | ... | stunt double: Hugh O'Brian (uncredited) |
Camera and Electrical Department
| James Bawden | ... | camera operator (as Jimmy Bawden) |
| H.A.R. Thomson | ... | second unit cameraman (as Bob Thomson) |
| Michael Browne | ... | gaffer (uncredited) |
| Steve Claydon | ... | focus puller: second unit (uncredited) |
| Anthony Pavey | ... | clapper loader: second unit (uncredited) |
| John von Kotze | ... | camera operator: second unit (uncredited) |
Costume and Wardrobe Department
| John McCorry | ... | wardrobe |
Music Department
| Malcolm Lockyer | ... | conductor |
Script and Continuity Department
| Phyllis Townshend | ... | continuity |
Additional Crew
| Gisela Trowe | ... | voice dubbing: Marianne Hoppe (german version) (uncredited) |
