Peter Dahlsen

Harry Webster (David Lyon) is an apparently normal husband and father who resides in contemporary Nottingham, England, which was once host to a flourishing textile industry. One day, Harry leaves his house and vanishes. A note he left behind alludes to a double life he no longer wishes to lead. His wife Liz (Annette Crosbie) conducts a search for her husband. Her findings raise a disturbing question: Did Harry have anything to do with a series of recent factory bombings?

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.