Note: This is an audio soundtrack of the TV story, with linking narration. Not to be confused with the novel reading of the same story released in 2017.
Jon Pertwee stars as the third Doctor in this soundtrack of an exciting BBCTV adventure, with linking narration by Richard Franklin
A dangerous adventure begins for the Doctor and Jo Grant when they visit Stangmoor Prison for a demonstration of the new Keller Machine. The device is said to extract negative emotions from convicted prisoners, leaving them pacified and reformed. But when it apparently goes wrong, a far more sinister purpose is revealed...
The Doctor's old enemy, the Master, is behind the machine, working in conjunction with an alien mind parasite. As unrest builds amongst Stangmoor's prisoners, the Master takes control, his ultimate aim to hijack a deadly missile and threaten the World Peace Conference taking place in London.
As Brigadier Lethbridge-Stewart leads UNIT in the defence of both the missile and Stangmoor, the Doctor and Jo Grant must fight to stay alive and help to prevent a third world war!
Richard Franklin, who plays Captain Mike Yates in the serial, provides linking narration for this original TV soundtrack from 1971. In a bonus interview he also talks about his time as a UNIT regular in Doctor Who.