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While investigating a vanishing Concorde at Heathrow Airport, the Doctor and his companions are thrown millions of years back in time, when a mysterious alien called Kalid is trying to control the ancient powers of the Xeraphin.
Length 100 minutes
Peter Davison | Sarah Sutton | Janet Fielding | Anthony Ainley | Nigel Stock | Richard Easton | Keith Drinkel | Michael Cashman | John Flint | Judith Byfield | Peter Dahlsen | Brian McDermott | Peter Cellier | Matthew Waterhouse | Hugh Hayes | André Winterton