6.417
100 min
An energy drain traps the Third Doctor and Sarah Jane Smith on the planet Exxilon with its hostile natives, causing the travellers to make an uneasy alliance with a Marine Space Corps expedition and a squadron of Daleks. The key to escape for all of them lies at the heart of a powerful and mysterious lost city, but only after a series of deadly traps.
| Name | Character | Team | |
|---|---|---|---|
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Jon Pertwee | The Doctor | Unowned |
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Elisabeth Sladen | Sarah Jane Smith | Unowned |
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Duncan Lamont | Dan Galloway | Unowned |
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John Abineri | Richard Railton | Unowned |
| Joy Harrison | Jill Tarrant | Unowned | |
| Julian Fox | Peter Hamilton | Unowned | |
| Neil Seiler | Commander Stewart | Unowned | |
| Arnold Yarrow | Bellal | Unowned | |
| Roy Heymann | Gotal | Unowned | |
| Mostyn Evans | High Priest | Unowned | |
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Michael Wisher | Dalek Voices | Unowned |
| John Scott Martin | Dalek | Unowned | |
| Murphy Grumbar | Dalek | Unowned | |
| Cy Town | Dalek | Unowned |