This Week in United Kingdom

The Mind of Evil: Episode Four
Last updated 02 January 2017
5:15pm-5:40pm BST (16:15 GMT) < > « »

(actually broadcast at 17:15:10)
BBC One

Featuring: Jon Pertwee, Nicholas Courtney, Katy Manning, Roger Delgado, Richard Franklin, John Levene, Michael Sheard
The mind parasite within the Keller Machine becomes too powerful for the Master to control. It learns how to move of its own accord and goes on the hunt for new minds.
Synopsis Source: Doctor Who Guide
Broadcast Source: BBC
Ratings Information:
Consolidated figures: 7.400m viewers (+7 days), 63rd place