All six episodes, including two that are animated due to their being missing from the BBC archives, of the second Doctor's classic 1967 adventure. In 'The Ice Warriors', the Doctor (Patrick Troughton), Jamie (Frazer Hines) and Victoria (Deborah Watling) arrive on Earth in the year 3000 AD - in the middle of the second Ice Age. At the Brittanicus Base, a team of scientists struggle to control the elements with a machine known as the Ioniser. When a body is found perfectly preserved in the ice barrier which surrounds the base, it is thawed out. The creature proves to be an Ice Warrior - one of an agressive reptilian race from Mars, intent on awakening its fellows and conquering the Earth.

The Doctor (Patrick Troughton), Jamie and Zoe arrive on the peaceful planet Dulcis for a holiday, only to find it invaded by the cruel Dominators and their vicious robot servitors, the Quarks. They must convince the placid Dulcians of the threat their world faces before the Dominators enslave them and destroy their world.

The Doctor (Patrick Troughton), Jamie and Zoe are captured and witness a series of war games staged by aliens on a mysterious planet, with warriors from history pitted against each other. They discover this to be a plot by the War Lords, who are being aided and abetted by the War Chief, a member of the Doctor's own race. In desperation the Doctor summons his people, the Time Lords, for help. This was Patrick Troughton's last regular appearance as the Doctor, and is the first story to feature the Time Lords.

The Doctor (Patrick Troughton), Jamie (Frazer Hines) and Zoe (Wendy Padbury) find themselves pulled out of reality and plunged into the Land of Fiction, where mythical creatures come to life. They must battle a Unicorn, Medusa and the Minotaur, with a little help from Jonathan Swift's Gulliver, D'Artagnon and Rapunzel. But who is the real enemy, and what does he want with the Doctor?

The Doctor (Patrick Troughton), Jamie and Zoe land on the planet of the Gonds, the brightest of whom are periodically selected to serve the unseen Krotons, and never seen again. When Zoe and the Doctor are selected too, the battle is on to destroy the crystalline aliens.

The Doctor (Patrick Troughton) and Jamie arrive at space station J7 to ask the Doctor's old friend Dastari to cease his experiments in time travel. The station is invaded, and when Doctor number 6 (Colin Baker) and Peri arrive, they find a shell-shocked Jamie claiming that the Doctor has been killed. It is in fact all part of a Sontaran plot to discover the secrets of time travel, which necessitates a trip to Seville to rescue the earlier incarnation of the Time Lord. Patrick Troughton's last appearance as the Doctor.