The Dæmons

The Doctor and Jo, joined eventually by the Brigadier and UNIT, in Devil’s End, where a mysterious Vicar is trying to summon the Devil.

The Claws of Axos

A group of gold-skinned aliens arrive on Earth offering a seemingly magical element in return for fuel. The Doctor sees through their seeming benevolence and uncovers their true nature, ultimately teaming up with his adversary the Master in efforts to take them down.

The Mind of Evil

The Doctor and Jo Grant investigate the Keller Machine at Stangmoor Prison, which is being used to remove any malicious elements of prisoners’ personalities.

Meanwhile, the Brigadier and UNIT are being stretched as they are responsible for security for the World Peace Conference, as well as having to deal with the decommissioning of a Thunderbolt Missile. Things only get more complicated for the Doctor and the Brigadier when they discover that the Master is behind the Keller Machine.