Plot
Arriving on Space Station Nerva in its distant past, the Doctor, Sarah and Harry find its crew threatened by a mysterious plague. Discovering that things are not as they seem, they uncover a Cyberman plot to destroy Voga, planet of gold.
| Writer | Robert Holmes |
|---|---|
| Director | Michael E. Briant |
| Actor | Tom Baker, Elisabeth Sladen, Ian Marter |
| Country | United Kingdom |
| Production | BBC |
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