Plot
An energy drain traps the Third Doctor and Sarah Jane Smith on the planet Exxilon with its hostile natives, causing the travellers to make an uneasy alliance with a Marine Space Corps expedition and a squadron of Daleks. The key to escape for all of them lies at the heart of a powerful and mysterious lost city, but only after a series of deadly traps.
Writer | Terry Nation |
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Director | Michael E. Briant |
Actor | Jon Pertwee, Elisabeth Sladen, Duncan Lamont |
Country | United Kingdom |
Production | BBC |