(4 episodes)
The Doctor and Sarah Jane land in Italy, only to discover that a wave of evil Mandragora energy has hitched a ride on the TARDIS and is now being used to plunge mankind back into the dark age. They have to thwart not only the murderous count, but also prevent the mad astronomer Heironymous and the Cult of Demnos from unleashing the Mandragora Helix on mankind.
Written by Louis Marks
(4 episodes)
The Doctor and Sarah are plunged into danger as soon as they step from the TARDIS. They arrive in a quarry rigged with explosives, and the blast leaves Sarah unconscious in the rubble, and clutching a fossilised stone hand. What strange power does it have over her?
Written by Bob Baker and Dave Martin
(4 episodes)
Gallifrey. Planet of the Time Lords. The Doctor has finally come home, but not by choice. Summoned by a vision from The Matrix, he is drawn into a web of political intrigue and assassination. Nothing is quite what it seems, and in the shadows lurks his oldest and deadliest enemy...
Written by Robert Holmes
(4 episodes)
When the TARDIS arrives on a jungle planet, the Doctor encounters two warring tribes, the Sevateem and the Tesh. The Sevateem worship a god called Xoanon and the Tesh are supposedly keeping Xoanon prisoner. But why do the Sevateem call the Doctor the Evil One? And what are the invisible creatures in the jungle? The Time Lord, with the help of a girl called Leela, is about to find out.
Written by Chris Boucher
(4 episodes)
The TARDIS, carrying the Doctor and his new companion Leela, arrives aboard a huge sandminer on a deserted world. The small human crew relies almost entirely on robots to carry out their every task and whim while they mine the planet's rich minerals. Suddenly, one by one, members of the team start to disappear. The time travelers discover that someone or something is murdering the crew, but, of course, nobody believes it could be the robots.
Written by Chris Boucher
(6 episodes)
Women of Victorian London fall prey to an unknown menace, while monstrous terrors lurk in the sewers under the city. Criminal gangs scurry in the dank fog, and a sinister stage magician and his eerie ventriloquist's dummy serve a mysterious master whose lair lies under a haunted theatre. The Doctor and Leela are plunged into a series of macabre horrors...
Written by Robert Holmes