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Jon Pertwee as The Doctor |
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Patrick Troughton as The Doctor |
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William Hartnell 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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Stephen Thorne as Omega |
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Rex Robinson as Doctor Tyler |
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Roy Purcell as President of the Council |
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Laurie Webb as Mr. Ollis |
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Clyde Pollitt as Chancellor |
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Graham Leaman as Time Lord |
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Patricia Prior as Mrs. Ollis |
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Denys Palmer as Corporal Palmer |
| Writing | Dave Martin | Writer |
| Directing | Lennie Mayne | Director |
| Writing | Bob Baker | Writer |
| Costume & Make-Up | Ann Rayment | Makeup Artist |
| Sound | Dudley Simpson | Original Music Composer |
| Costume & Make-Up | James Acheson | Costume Design |
| Production | Barry Letts | Producer |
| Sound | Derek Miller-Timmins | Sound |
| Crew | Dick Mills | Special Sound Effects |
| Editing | Jim Walker | Editor |
| Art | Roger Liminton | Production Design |
| Camera | John Baker | Camera Operator |
| Production | David Tilley | Production Assistant |
| Visual Effects | Michealjohn Harris | Visual Effects |
| Sound | Delia Derbyshire | Theme Song Performance |
