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Pamela Franklin as Florence Tanner |
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Roddy McDowall as Benjamin Franklin Fischer |
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Clive Revill as Dr. Lionel Barrett |
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Gayle Hunnicutt as Ann Barrett |
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Roland Culver as Mr. Rudolph Deutsch |
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Peter Bowles as Hanley |
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Michael Gough as Emeric Belasco (uncredited) |
| Production | Albert Fennell | Producer |
| Writing | Richard Matheson | Novel |
| Directing | John Hough | Director |
| Production | Norman T. Herman | Producer |
| Production | James H. Nicholson | Executive Producer |
| Production | Susan Hart | Executive Producer |
| Writing | Richard Matheson | Screenplay |
| Production | Sally Nicholl | Casting |
| Sound | Brian Hodgson | Original Music Composer |
| Costume & Make-Up | Linda DeVetta | Makeup Artist |
| Editing | Geoffrey Foot | Editor |
| Camera | Alan Hume | Director of Photography |
| Sound | Dudley Simpson | Original Music Composer |
| Sound | Delia Derbyshire | Original Music Composer |
| Art | Robert Jones | Art Direction |
| Costume & Make-Up | Pat McDermott | Hairstylist |
| Visual Effects | Tom Howard | Visual Effects |
| Directing | Gladys Goldsmith | Continuity |
| Production | Ron Fry | Production Manager |
| Art | Robert Jones | Set Designer |
| Art | Kenneth McCallum Tait | Assistant Art Director |
| Crew | Roy Whybrow | Special Effects |
| Costume & Make-Up | Eileen Sullivan | Wardrobe Master |
| Sound | Peter Lennard | Sound Editor |
| Directing | Bert Batt | Assistant Director |
| Sound | Les Hammond | Sound Recordist |
| Camera | Tony White | Camera Operator |
| Sound | Bill Rowe | Sound Recordist |
| Sound | Peter Lennard | ADR Editor |
| Sound | Delia Derbyshire | Sound Effects |
| Sound | Brian Hodgson | Sound Effects |
| Sound | John Potter | Boom Operator |
