The Mind of Evil: Episode Three 1971
7.7 227 Realising Chin-Lee has been using the power of the Keller Machine to carry out assassinations, the Doctor heads back to Stangmoor, only to find the Master has teamed up with Mailer to stage another riot.
Runtime: 24
Starts: Jon Pertwee, Roger Delgado, Nicholas Courtney, Katy Manning
Director: Timothy Combe