Doctor Who: The Mind of Evil

Professor Emil Keller has created a machine that can pacify even the most dangerous of criminals. But when the Doctor and Jo arrive at Stangmoor Prison for a demonstration, things start to go horribly wrong - especially when they discover that the Doctor's old enemy the Master is responsible for the machine.

• 
  Jon Pertwee

  The Doctor
• 
  Katy Manning

  Jo Grant
• 
  Nicholas Courtney

  Brigadier Lethbridge-Stewart
• 
  Richard Franklin

  Captain Mike Yates
• 
  John Levene

  Sergeant Benton
• 
  Roger Delgado

  The Master
• 
  Pik-Sen Lim

  Captain Chin Lee
• 
  Michael Sheard

  Dr. Roland Summers
• 
  Neil McCarthy

  George Patrick Barnham
• 
  William Marlowe

  Mailer