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Tom Baker as The Doctor / Xoanon |
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Louise Jameson as Leela |
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David Garfield as Neeva |
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Victor Lucas as Andor |
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Brendan Price as Tomas |
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Leslie Schofield as Calib |
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Colin Thomas as Sole |
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Lloyd McGuire as Lugo |
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Tom Kelly as Guard |
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Brett Forrest as Guard |
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Rob Edwards as Xoanon (voice) |
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Pamela Salem as Xoanon (voice) |
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Anthony Frieze as Xoanon (voice) |
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Roy Herrick as Xoanon (voice) |
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Leon Eagles as Jabel |
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Mike Elles as Gentek |
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Peter Baldock as Acolyte |
| Editing | Tariq Anwar | Editor |
| Production | Philip Hinchcliffe | Producer |
| Directing | Pennant Roberts | Director |
| Writing | Chris Boucher | Writer |
| Writing | Robert Holmes | Script Editor |
| Sound | Dudley Simpson | Original Music Composer |
| Art | Austin Ruddy | Production Design |
| Editing | Pam Bosworth | Editor |
| Crew | Dick Mills | Special Sound Effects |
| Costume & Make-Up | John Bloomfield | Costume Design |
| Sound | Colin Dixon | Sound |
| Crew | Terry Walsh | Stunt Coordinator |
| Lighting | Derek Slee | Lighting Director |
| Camera | John McGlashan | Camera Operator |
| Costume & Make-Up | Ann Ailes-Stevenson | Makeup Artist |
| Production | Marion McDougall | Production Assistant |
| Visual Effects | Mat Irvine | Visual Effects Designer |
| Sound | Delia Derbyshire | Theme Song Performance |