The Mind of Evil (4)

Doctor WhoSeason 8

Earth, the near future. The Doctor visits Stangmoor Prison to see the Keller Machine, a revolutionary new type of rehabilitation aid, in action – but finds his fellow observers literally dying of fear. Who is responsible for creating the Machine? And how does it connect to the peace conference happening in London?


First Aired On:
Feb 20th, 1971
Guest Stars
David Calderisi
Don Houghton
Timothy Combe


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