Title from disc. Peter Davison, Stratford Johns, Matthew Waterhouse, Sarah Sutton, Janet Fielding. Originally broadcast as single episodes of a television program in 1982. Full screen (4x3).
Summary:
Doctor Who discovers that the return Tegan to Heathrow Airport has brought the Tardis to a spacecraft that appears abandoned at first, but actually carries a force of frog-like aliens that may challenge the future of humankind on Earth.
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