Doctor Who: The Mind of Evil

The Mind of Evil is the second serial of the eighth season of the British science fiction television series Doctor Who, which was first broadcast in six weekly parts on BBC1 from 30 January to 6 March 1971.

The Third Doctor and Jo visit Stangmoor Prison to examine a new method of treating criminals, whereby negative impulses are removed from the mind using the Keller Machine. Professor Kettering, who is managing the use of the process at the behest of the absent Emile Keller, reconditions a number of inmates including Barnham, a hardened criminal who reverts to an innocent and childlike state due to the process.

The Doctor’s suspicions about the Keller Machine are heightened following a string of deaths, including that of Kettering himself, which occur when the machine is operated. Each death seems to involve personal phobias – and the Doctor is threatened by an inferno when he gets too close to the machine.

Meanwhile, Brigadier Lethbridge-Stewart and the troops of UNIT are handling the security arrangements for the first World Peace Conference. Captain Chin Lee of the Chinese delegation is behaving strangely and attempting to heighten tension in relations with the United States. It emerges that her actions are under the influence of the Master.

She uses the transmitted power of the Keller Machine against the American delegate, Senator Alcott, who barely survives the attack. Captain Chin Lee is deconditioned by the Doctor, and tells him that Emile Keller is the Master, whom the Doctor has previously trapped on Earth by stealing the dematerialisation circuit of his TARDIS.

At Stangmoor a riot has broken out and resulted in a dangerous criminal, Harry Mailer, seizing control of the prison. Jo is briefly taken hostage, but she enables the guards to retake the prison. The Master, who has heard of the riot by eavesdropping on UNIT’s radio communications, arrives and meets Mailer, to whom he supplies enough gas grenades for Mailer and his prisoners to retake control of the prison.

The Doctor returns to the prison only to be captured by the Master, who sets the Keller Machine loose on the mind of his old foe, weakening the Doctor considerably. But the Master is losing control of the Keller Machine, which contains an alien Mind Parasite that is dangerous even to a Time Lord, and forces the Doctor to help him contain its power. This done, the Doctor is returned to his cell.

The Master has come to Stangmoor to recruit the prisoners as a private army, and uses them to hijack a UNIT convoy transporting a deadly Thunderbolt nerve gas missile, which he intends to fire at the Peace Conference. Captain Mike Yates, who was in charge of the convoy, is taken prisoner by the criminals. Left in the dark, the Brigadier decides the Thunderbolt missile must be at Stangmoor and comes to the rescue in a “Trojan Horse” style assault.

UNIT troops take control of the prison, killing Mailer and the other leading rioters. But the Keller Machine is growing stronger, and now breaks free of the temporary restraints placed on it by the Doctor, who discovers by chance that Barnham, having previously been subjected to the Keller process and thus having no evil left in his mind, has become immune to the Mind Parasite.

Yates contacts UNIT and informs them that the Thunderbolt is hidden on an abandoned airfield near the prison. The Doctor contacts the Master, offering to return his dematerialisation circuit in exchange for the missile. The Master agrees on condition he will come alone. But the Doctor uses Barnham to transport the Keller Machine to the airfield and turn the Mind Parasite loose on the Master.

With the Master helpless, the Doctor is able to trigger the missile’s self-destruct circuit and the Thunderbolt and the Keller Machine are destroyed. The Master uses the chaos to escape with his dematerialisation circuit, killing Barnham in the process. He contacts the Doctor by telephone to taunt him that he is now free while the Doctor remains trapped in his exile on Earth.

.

To view the list of other Doctor Who serials, please click this link

Doctor Who Episode Guides for Sale on Amazon

Step aboard the TARDIS and journey across the universe with every incarnation of The Doctor in this series of unofficial Doctor Who episode companions.

This collection of twelve books explores every televised adventure of the Time Lord’s lives.

Each volume in the series delves into a different Doctor’s era, offering detailed episode guides, behind-the-scenes insights, character profiles, and story synopses.

Once you have clicked the link, choose which book you want, and then whether you want to buy the Kindle (eBook) or Paperback versions.

Previews are available before you buy.

Visit the Australian Business and Leadership School

www.abls.com.au