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Raquel Welch as Fathom Harvill |
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Anthony Franciosa as Peter Merriwether |
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Ronald Fraser as Col. Douglas Campbell, Chief of HADES |
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Richard Briers as Flight Lt. Timothy Webb |
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Greta Chi as Maj. Jo-May Soon (KGB) |
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Tom Adams as Mike |
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Elizabeth Ercy as Ulla |
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Ann Lancaster as Mrs. Trivers |
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Tutte Lemkow as Mehmed |
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Reg Lye as Mr. Trivers |
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Clive Revill as Serapkin |
| Directing | Leslie H. Martinson | Director |
| Writing | Larry Forrester | Novel |
| Writing | Lorenzo Semple Jr. | Screenplay |
| Camera | Michael Walter | Key Grip |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Sound | Cyril Collick | Sound Recordist |
| Directing | David Tringham | Assistant Director |
| Crew | Donna Garrett | Stunt Double |
| Art | Maurice Carter | Art Direction |
| Costume & Make-Up | Bridget Sellers | Wardrobe Supervisor |
| Art | Maurice Binder | Title Designer |
| Editing | Elizabeth Thoyts | Assistant Editor |
| Sound | John Dankworth | Conductor |
| Sound | Jonathan Bates | Sound Editor |
| Editing | Max Benedict | Editor |
| Costume & Make-Up | Alan Brownie | Makeup Artist |
| Costume & Make-Up | Joan Smallwood | Hairdresser |
| Sound | John Dankworth | Original Music Composer |
| Costume & Make-Up | Kiki Byrne | Costume Design |
| Camera | Douglas Slocombe | Director of Photography |
| Camera | Chic Waterson | Camera Operator |
