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 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), 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) 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.

Feature-length episode to celebrate the 20th anniversary of the long-running sci-fi series. All five Doctors (Peter Davison, Patrick Troughton, Jon Pertwee, Richard Hurndall and Tom Baker) and many of their old companions are taken out of time and deposited in the Death Zone on Gallifrey. There they must battle not only the Master, but Daleks, Cybermen and Yeti in order to reach the Dark Tower and discover the Tomb of Rassilon. This special edition includes new special effects and extra footage not included in the original broadcast.