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Jon Pertwee as The Doctor |
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Katy Manning as Jo Grant |
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David Troughton as Peladon |
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Geoffrey Toone as Hepesh |
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Henry Gilbert as Torbis |
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Alan Bennion as Izlyr |
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Sonny Caldinez as Ssorg |
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Stuart Fell as Alpha Centauri |
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Ysanne Churchman as Alpha Centauri (voice) |
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Nick Hobbs as Aggedor |
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Murphy Grumbar as Arcturus |
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Terry Bale as Arcturus (voice) |
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Gordon Stothard as Grun |
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George Giles as Guard Captain |
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Wendy Danvers as Amazonia |
| Editing | Michael Shah Dayan | Editor |
| Costume & Make-Up | Barbara Lane | Costume Design |
| Art | Gloria Clayton | Production Design |
| Directing | Lennie Mayne | Director |
| Writing | Brian Hayles | Writer |
| Production | Barry Letts | Producer |
| Sound | Dudley Simpson | Original Music Composer |
| Sound | Delia Derbyshire | Theme Song Performance |
| Writing | Terrance Dicks | Script Editor |
