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Gordon Jackson as Dr. Thomas Murray |
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Christina Gregg as Christine (misidentified as "Janet" in end credits) |
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Lisa Daniely as Annette |
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André Maranne as Paul Dassin |
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Humphrey Lestocq as Mark Jennings |
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Douglas Ives as Jessop |
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John Serret as Father Larouche |
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Annette Carell as Maria |
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Steve Plytas as Bellac |
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Viola Keats as Mrs. Ervine |
| Directing | Montgomery Tully | Director |
| Writing | Eldon Howard | Writer |
| Writing | Brian Clemens | Writer |
| Editing | John Dunsford | Editor |
| Art | Peter Russell | Art Direction |
| Production | Brian Taylor | Production Supervisor |
| Camera | Bert Mason | Director of Photography |
| Sound | Bill LeSage | Music Supervisor |
| Production | John Draper | Production Manager |
| Sound | W. Anson Howell | Sound Supervisor |
| Directing | Geoffrey Helman | Assistant Director |
| Camera | Paddy Aherne | Camera Operator |
| Sound | George Adams | Sound Recordist |
| Directing | Phyllis Townshend | Continuity |
| Costume & Make-Up | Gene Beck | Makeup Artist |
| Costume & Make-Up | Elsie Alder | Hairdresser |
| Costume & Make-Up | Rene Coke | Wardrobe Master |
| Production | Edward J. Danziger | Producer |
| Production | Harry Lee Danziger | Producer |
