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William Hartnell as The Doctor |
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Carole Ann Ford as Susan Foreman |
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Jacqueline Hill as Barbara Wright |
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William Russell as Ian Chesterton |
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George Coulouris as Arbitan |
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Martin Cort as Voord / Warrior / Ice Soldier / Aydan |
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Peter Stenson as Voord / Ice Soldier / Second Judge |
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Gordon Wales as Voord |
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Robin Phillips as Altos |
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Katherine Schofield as Sabetha |
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Heron Carvic as Voice of Morpho (voice) |
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Edmund Warwick as Darrius |
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Francis de Wolff as Vasor |
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Michael Allaby as Ice Soldier / Larn |
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Alan James as Ice Soldier / First Judge / Guard |
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Anthony Verner as Ice Soldier |
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Henley Thomas as Tarron |
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Raf De La Torre as Senior Judge |
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Fiona Walker as Kala |
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Donald Pickering as Eyesen |
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Stephen Dartnell as Yartek |
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Dougie Dean as Eprin (uncredited) |
| Directing | John Gorrie | Director |
| Writing | Terry Nation | Writer |
| Production | Mervyn Pinfield | Associate Producer |
| Costume & Make-Up | Jill Summers | Makeup & Hair |
| Costume & Make-Up | Daphne Dare | Costume Design |
| Writing | David Whitaker | Script Editor |
| Production | Verity Lambert | Producer |
| Sound | Norman Kay | Music |
| Sound | Delia Derbyshire | Theme Song Performance |
