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Peter Davison as The Doctor |
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Matthew Waterhouse as Adric |
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Sarah Sutton as Nyssa / Ann Talbot |
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Janet Fielding as Tegan Jovanka |
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Michael Cochrane as Lord Cranleigh |
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Barbara Murray as Lady Cranleigh |
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Gareth Milne as The Unknown / George Cranleigh |
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Moray Watson as Sir Robert Muir |
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Ivor Salter as Sergeant Markham |
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Andrew Tourell as Constable Cummings |
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Ahmed Khalil as Latoni |
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Brian Hawksley as Brewster |
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Timothy Block as Tanner |
| Writing | Terence Dudley | Writer |
| Directing | Ron Jones | Director |
| Writing | Eric Saward | Script Editor |
| Production | John Nathan-Turner | Producer |
| Sound | Ron Blight | Sound |
| Art | Tony Burrough | Production Design |
| Editing | Mike Houghton | Editor |
| Camera | Peter Chapman | Camera Operator |
| Sound | Roger Limb | Original Music Composer |
| Costume & Make-Up | Rosalind Ebbutt | Costume Design |
| Crew | Dick Mills | Special Sound Effects |
| Sound | Alan Machin | Sound |
| Lighting | Fred Wright | Lighting Director |
| Costume & Make-Up | Lisa Westcott | Makeup Artist |
| Editing | Rod Waldron | Editor |
| Visual Effects | Dave Chapman | Visual Effects |
| Visual Effects | Tony Auger | Visual Effects Designer |
| Sound | Peter Howell | Theme Song Performance |
