7.143
75 min
The arrival of a mysterious comet heralds impending danger from enemies both old and new. As Ace helps the Doctor defend Earth, she is confronted with a dangerous question..."Doctor Who?"
| Name | Character | Team | |
|---|---|---|---|
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Sylvester McCoy | The Doctor | Unowned |
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Sophie Aldred | Ace | Unowned |
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Anton Diffring | De Flores | Unowned |
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Fiona Walker | Lady Peinforte | Unowned |
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Gerard Murphy | Richard | Unowned |
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Leslie French | Mathematician | Unowned |
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Dolores Gray | Mrs Remington | Unowned |
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David Banks | Cyber Leader | Unowned |
| Mark Hardy | Cyber Lieutenant | Unowned | |
| Metin Yenal | Karl | Unowned | |
| Courtney Pine | Himself | Unowned | |
| Chris Chering | Skinhead 1 | Unowned | |
| Symond Lawes | Skinhead 2 | Unowned |