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Jon Pertwee as The Doctor |
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Katy Manning as Jo Grant |
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Leslie Dwyer as Vorg |
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Cheryl Hall as Shirna |
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Tenniel Evans as Major Daly |
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Ian Marter as John Andrews |
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Jenny McCracken as Claire Daly |
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Peter Halliday as Pletrac |
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Michael Wisher as Kalik |
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Terence Lodge as Orum |
| Directing | Barry Letts | Director |
| Writing | Robert Holmes | Writer |
| Sound | Dudley Simpson | Original Music Composer |
| Costume & Make-Up | James Acheson | Costume Design |
| Camera | Peter Hamilton | Camera Operator |
| Lighting | Clive Thomas | Lighting Director |
| Sound | Gordon Mackie | Sound |
| Writing | Terrance Dicks | Script Editor |
| Art | Roger Liminton | Production Design |
| Costume & Make-Up | Angela Seyfang | Makeup Artist |
| Crew | Brian Hodgson | Special Sound Effects |
| Production | Barry Letts | Producer |
| Production | Chris D'Oyly-John | Production Assistant |
| Visual Effects | John Horton | Visual Effects Designer |
| Sound | Delia Derbyshire | Theme Song Performance |
