30 episodes were originally broadcast in 1977
The Doctor arrives on an alien world and is taken captive by the savage Sevateem tribe.
With the Sevateem against him, the Doctor attempts to win their trust by facing the trial of the Horta.
Penetrating the barrier with Leela, the Doctor enters the spaceship which is controlled by the Tesh.
Determined to rectify his earlier mistake, the Doctor tries to repair Xoanon.
The TARDIS takes the Doctor and Leela to a huge, mobile sand mine on an alien world.
The Doctor and Leela are blamed for the murder of one of the sandminer’s crew.
One of the crew is the insane Taren Capel, who is using robots to carry out the murders.
The Doctor and Leela join forces with the surviving crew members to defend themselves from the robots.
London, the 1890s. A spate of disappearances amongst young women goes largely unnoticed.
The Doctor and Leela take refuge at the home of Professor Litefoot.
Leela takes the opportunity to track the Chinese God to his lair where she must confront one of his terrifying creations.
The Doctor and Leela attend Li H'Sen Chang's performance, hoping to confront the magician.
The Doctor and his allies try to track down Weng-Chiang.
The Doctor and Weng-Chiang have their final confrontation in the mysterious House of the Dragon -- watched by the evil duplicitous Mr.
The TARDIS lands on Fang Rock island at the start of the 20th century.
The Doctor seals the survivors inside the lighthouse but discovers that the creature might be with them.
The Doctor devises a desperate plan to defeat the alien and repel the approaching Rutan mothership.
Deep space, 5000 AD. An Earth supply shuttle is infected by a strange sentient space-born virus.
Leela and Lowe take the Doctor to the Bi-Al Foundation for help.
Miniaturized clones of the Doctor and Leela are injected into his brain.
The Nucleus, now grown to human size, is determined to spawn and take over the Galaxy.
A mysterious skull that is older than mankind is exerting a deadly influence on those around it.
The Doctor realises that an ancient horror from the mythology of his own people is manifesting at Fetch Priory.
The Doctor and Leela take a trip in the TARDIS to discover the truth about the ancient evil from the dawn of time.
Thea has become the Fendahl Core and Stahl realises that he is out of his depth.
Pluto has been made habitable and turned into a giant factory where the ruthless Company exploits its workers.
The Doctor is taken prisoner by the Gatherer and sent to the Correction Centre.
The Doctor is free but Leela has been captured by the Gatherer and is sentenced to a grisly death.
The Others launch a full-scale uprising against the Gatherer and his Inner Retinue.