The Mind of Evil

3rd Doctor

Jo Grant  Lethbrige - Stewart  The Master

Location: Earth


Mind of Evil

The Master, posing as Professor Keller, has created a device he purports will remove the negative impulses from the brains of convicted criminals. The Keller Machine in fact contains an alien mind parasite which turns the convicts into servants of the Master. With their help, the evil Time Lord hijacks a nerve missile, with which he intends to hold a world peace conference hostage.

The Doctor and Jo are investigating a revolutionary new way of treating psychotic criminals, but Professor Keller, the inventor, is the Doctor's arch-enemy - The Master...
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