The Mind of Evil Synopsis
The Doctor is caught up in events at Stangmoor Prison, where Professor Keller’s new machine is said to be able to remove all evil impulses from the minds of the prisoners.
The Doctor is caught up in events at Stangmoor Prison, where Professor Keller’s new machine is said to be able to remove all evil impulses from the minds of the prisoners.
The Doctor and Jo watch a demonstration of the Keller Machine which can extract evil impulses from criminals.
A full scale riot takes place at the Prison and Jo is taken hostage.
The Master is behind the Keller Machine and uses it to recruit the rioting inmates at Stangmoor Prison.
The mind parasite within the Keller Machine becomes too powerful for the Master to control.
The Master forms an uneasy alliance with the Doctor so that between them they can subdue the Keller Machine.
The Keller Machine breaks free of the Doctor's restraining device. The Doctor turns it against the Master.
Third DoctorJon Pertwee
Alistair Gordon Lethbridge-StewartNicholas Courtney
Jo GrantKaty Manning
Mike YatesRichard Franklin
Captain Chin LeePik-Sen Lim
Prison GovernorRaymond Westwell
Dr. SummersMichael Sheard
Professor KetteringSimon Lack
BarnhamNeil McCarthy
Corporal BellFernanda Marlowe
LinwoodClive Scott
Chief Prison Officer PowersRoy Purcell
Senior Prison Officer GreenEric Mason
The MasterRoger Delgado
John BentonJohn Levene
MailerWilliam Marlowe
VosperHaydn Jones
Fu PengKristopher Kum
Senator AlcottTommy Duggan
CharlieDavid Calderisi
Major CosworthPatrick Godfrey
FullerJohnny Barrs
Main Gate PrisonerMatthew Walters
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