Peter Moffatt (Director) · Anthony Steven (Writer)
Colin Baker
The Doctor
Nicola Bryant
Peri Brown
Maurice Denham
Edgeworth
Edwin Richfield
Mestor
Kevin McNally
Hugo Lang
Dennis Chinnery
Sylvest
Gavin Conrad
Romulus
Andrew Conrad
Remus
Seymour Green
Chamberlain
Oliver Smith
Drak
Barry Stanton
Noma
Dione Inman
Elena
Helen Blatch
Fabian
Roger Nott
Prisoner
John Wilson
Jacondan Guard
Graham Cole
Jacondan
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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?
