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Jon Pertwee as The Doctor |
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Katy Manning as Jo Grant |
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Nicholas Courtney as Brigadier Lethbridge-Stewart |
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John Levene as Sergeant Benton |
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Richard Franklin as Captain Mike Yates |
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Stewart Bevan as Cliff Jones |
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Jerome Willis as Stevens |
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Tony Adams as Elgin |
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Ben Howard as Hinks |
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Mostyn Evans as Dai Evans |
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Talfryn Thomas as Dave |
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Roy Evans as Bert |
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Mitzi McKenzie as Nancy |
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Ray Handy as Milkman |
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John Scott Martin as Hughes |
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John Rolfe as Fell |
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John Dearth as BOSS (voice) |
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Richard Beale as Minister of Ecology |
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Jean Burgess as Cleaner |
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Brian Justice as Yates' Guard |
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Terry Walsh as Guard |
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Roy Skelton as James |
| Writing | Robert Sloman | Writer |
| Directing | Michael E. Briant | Director |
| Crew | Dick Mills | Special Sound Effects |
| Crew | Terry Walsh | Stunt Coordinator |
| Production | Barry Letts | Producer |
| Camera | Bill Matthews | Camera Operator |
| Camera | Ken Lowe | Camera Operator |
| Costume & Make-Up | Ann Rayment | Makeup Artist |
| Sound | Richard Chubb | Sound |
| Production | Michael McDermott | Production Assistant |
| Writing | Terrance Dicks | Script Editor |
| Costume & Make-Up | Barbara Kidd | Costume Design |
| Sound | Simon Wilson | Sound |
| Editing | Alastair Mackay | Editor |
| Lighting | Mike Jefferies | Lighting Director |
| Sound | Dudley Simpson | Original Music Composer |
| Production | John Harris | Production Assistant |
| Art | John Burrowes | Production Design |
| Visual Effects | Ron Oates | Visual Effects Designer |
| Sound | Delia Derbyshire | Theme Song Performance |
