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Jon Pertwee as The Doctor |
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Elisabeth Sladen as Sarah Jane Smith |
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Nina Thomas as Queen Thalira |
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Frank Gatliff as Chancellor Ortron |
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Rex Robinson as Gebek |
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Ralph Watson as Ettis |
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Graeme Eton as Preba |
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Michael Crane as Blor |
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Terry Walsh as Guard Captain |
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Max Faulkner as Miner |
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Roy Evans as Miner |
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Nick Hobbs as Aggedor |
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Donald Gee as Eckersley |
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Stuart Fell as Body of Alpha Centauri |
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Ysanne Churchman as Voice of Alpha Centauri |
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Alan Bennion as Azaxyr |
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Sonny Caldinez as Sskel |
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Gerald Taylor as Vega Nexos |
| Production | Barry Letts | Producer |
| Directing | Lennie Mayne | Director |
| Writing | Brian Hayles | Writer |
| Sound | Dudley Simpson | Original Music Composer |
| Sound | Delia Derbyshire | Theme Song Performance |
| Writing | Terrance Dicks | Script Editor |
