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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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Roger Delgado as The Master |
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Nicholas Pennell as Winton |
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John Ringham as Ashe |
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David Webb as Leeson |
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Sheila Grant as Jane Leeson |
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Roy Skelton as Norton |
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Helen Worth as Mary Ashe |
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John Line as Martin |
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Mitzi McKenzie as Mrs. Martin |
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John Scott Martin as Robot |
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Pat Gorman as Primitive / Voice / Long / Colonist |
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Graham Leaman as Time Lord |
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Peter Forbes-Robertson as Time Lord |
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John Baker as Time Lord |
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Bernard Kay as Caldwell |
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Morris Perry as Captain Dent |
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Tony Caunter as Morgan |
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John Herrington as Holden |
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Stanley McGeagh as Alien |
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John Tordoff as Alec Leeson |
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Norman Atkyns as The Guardian |
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Roy Heymann as Alien Priest |
| Writing | Malcolm Hulke | Writer |
| Directing | Michael E. Briant | Director |
| Writing | Terrance Dicks | Script Editor |
| Production | Barry Letts | Producer |
| Costume & Make-Up | Jan Harrison Shell | Makeup Artist |
| Editing | William Symon | Editor |
| Sound | David Hughes | Sound |
| Costume & Make-Up | Michael Burdle | Costume Design |
| Sound | Tony Millier | Sound |
| Lighting | Ralph Walton | Lighting Director |
| Art | Tim Gleeson | Production Design |
| Visual Effects | Bernard Wilkie | Visual Effects |
| Sound | Dudley Simpson | Original Music Composer |
| Camera | Peter Hall | Camera Operator |
| Sound | Delia Derbyshire | Theme Song Performance |
