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Beatrix Lehmann as Dr. Susan Calvin |
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Tenniel Evans as QT-1 |
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David Healy as Greg Powell |
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Brian Davies as Mike Donovan |
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Julie Allan as Martha Powell |
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Judy Keirn as Abigail Donovan |
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Michael Wolf as Van Muller |
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James Cossins as Interviewer |
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David Graham as Robot (voice) |
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Roy Skelton as Robot (voice) |
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Hayden Jones as Robot (voice) |
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Chris Blackwell as Robot |
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Tony Barnes as Robot |
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Derek Davis as Robot |
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Ron Eagleton as Robot |
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Graham Lawson as Robot |
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George Rutland as Robot |
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Robin Sherringham as Robot |
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Jim Wyatt as Robot |
| Directing | Naomi Capon | Director |
| Writing | Robert Muller | Adaptation |
| Writing | Michael Imison | Script Editor |
| Production | Irene Shubik | Producer |
| Production | George Spenton-Foster | Associate Producer |
| Sound | Delia Derbyshire | Original Music Composer |
| Sound | Norman Kay | Theme Song Performance |
| Art | Richard Henry | Production Design |
| Writing | Isaac Asimov | Short Story |
