Doctor Who: The Twin Dilemma

Directed by Peter Moffatt

With Colin Baker, Nicola Bryant, Maurice Denham, Edwin Richfield and Kevin McNally

The Doctor has regenerated and all is not well. Confused, angry and acting strangely, the new Doctor decides to become a hermit, so takes his concerned companion Peri to a desolate asteroid where he plans to live for several centuries. However, the time travellers soon uncover a plot that threatens the entire galaxy. Why has an alien Gastropod kidnapped a pair of genius twins, and will the Doctor recover in time to find out?