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Tom Baker as The Doctor / Meglos |
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Lalla Ward as Romana II |
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John Leeson as K9 (voice) |
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Bill Fraser as General Grugger |
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Frederick Treves as Lieutenant Brotadac |
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Edward Underdown as Zastor |
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Jacqueline Hill as Lexa |
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Colette Gleeson as Caris |
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Crawford Logan as Deedrix / Meglos (voice) (uncredited) |
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Christopher Owen as Earthling |
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Simon Shaw as Tigellan Guard |
| Production | Barry Letts | Executive Producer |
| Writing | Andrew McCulloch | Writer |
| Production | John Nathan-Turner | Producer |
| Directing | Terence Dudley | Director |
| Writing | John Flanagan | Writer |
| Sound | Paddy Kingsland | Original Music Composer |
| Writing | Christopher H. Bidmead | Script Editor |
| Sound | Peter Howell | Original Music Composer |
| Camera | Alec Wheal | Camera Operator |
| Lighting | Bert Postlethwaite | Lighting Director |
| Production | Marilyn Gold | Production Assistant |
| Editing | Ian Williams | Editor |
| Art | Philip Lindley | Production Design |
| Editing | Sam Upton | Editor |
| Visual Effects | Steven Drewett | Visual Effects |
| Costume & Make-Up | Cecile Hay-Arthur | Makeup Artist |
| Costume & Make-Up | June Hudson | Costume Design |
| Crew | Dick Mills | Special Sound Effects |
| Sound | John Holmes | Sound |
| Sound | Peter Howell | Theme Song Performance |
