Episode guide - 3rd Doctor

Series 7

1. Spearhead from Space - The newly regenerated Doctor has barely enough time to adjust before he gets involved in an alien invasion of Earth. The Autons are here to make the planet their own, and only the Doctor and UNIT can stop them.
2. Doctor Who and the Silurians - A nuclear research centre is suffering a series of mysterious malfunctions, and the Doctor and UNIT are called in to investigate. After millions of years of slumber, the Silurians have awakened — and they want their planet back.
3. The Ambassadors of Death - Two manned astronaut missions to Mars have gone awry and the Doctor becomes suspicious. It seems that nothing is simple as he attempt to piece together the mystery surrounding mankind's contact with an alien species.
4. Inferno - The government are drilling into the Earth's crust, but a toxic green slime oozes from the drill head, infecting those who touch it. Meanwhile, the Doctor gets flung into a parallel world, with Primords on the loose.

Series 8

1. Terror of the Autons - The Doctor is warned that the Master has arrived on Earth. The Master has allied himself with the Nestene Consciousness in its latest bid for world conquest.
2. The Mind of Evil - The Doctor & Jo are sent to investigate the Keller Machine, a device that treats hardened criminals, created by Professor Kettering. However, neither the Keller Machine nor the Professor are what they seem...
3. The Claws of Axos - An organic spaceship lands in England, and the crew, a group of gold-skinned humanoids, claim their homeworld was destroyed by a solar flare. They show the humans their gift, "Axonite", and it seems innocent, until it turns out Axons.
4. Colony in Space - The Doctor is sent to the planet Uxarieus, where colonists are being intimidated by the Interplanetry Mining Corporation (the IMC). An Adjudicator is called from Earth but it is actually the Master.
5. The Dæmons - Near the village of Devil's End, an archeological dig is set to break into an ancient tomb. Gargoyles are coming to life, a coven is performing occult rituals, and what they are about to awaken might just signal the end of the human race.

Series 9

1. Day of the Daleks - Rebels from a future Earth conquered by the Daleks travel to the 20th Century to prevent that from happening. But will their actions prevent that future, or make it inevitable?
2. The Curse of Peladon - The Doctor & Jo land on the planet Peladon, where they become embroiled in the politics of its admission to the Galactic Federation, and have to contend with an ancient royal curse.
3. The Sea Devils - The Doctor and Jo visit the Master in his island prison and encounter the Sea Devils, the aquatic cousins of the Silurians.
4. The Mutants - It is the 30th century, near the end of the Earth Empire. On the colony world of Solos, something is transforming the human population, turning them into hideous mutants. But as the Doctor & Jo find out, that is only the beginning.
5. The Time Monster - The Doctor & Jo investigate the workings of the TOMTIT machine, a wondrous device created by Professor Thascales. Neither are what they seem, and what secret power is locked within the crystal of Kronos?

Series 10

1. The Three Doctors - Gallifrey is under siege, by an unknown force that by all accounts should not even exist. The only person who can help them is the Doctor, but even he will need assistance — from his previous selves.
2. The Carnival of Monsters - The Doctor and Jo arrive on the SS Bernice, a cargo ship which disappeared without trace in 1926. However, it becomes apparent that they are being watched…
3. Frontier in Space - Materialising on a cargo ship in the 26th century, there are tensions between the Earth and Draconian Empires. With both sides accusing each other of aggression, the Doctor suspects a third party might be involved. But who would benefit from the devastation of an interplanetary war?
4. Planet of the Daleks - The Doctor brings the TARDIS to the planet Spiridon, which hides deadly secrets: carnivorous plants, a planetary core of molten ice, invisible inhabitants, and most frightening of all, an army of Daleks.
5. The Green Death - A death at an abandoned coal pit brings UNIT & the Doctor to the town of Llanfairfach when the body is found glowing bright green. Are pollutants from Global Chemicals responsible? And who is the mysterious BOSS?

Series 11

1. The Time Warrior - A Sontaran named Linx, trapped in the Middle Ages, uses crude time travel technology to kidnap scientists from the 20th Century to help repair his spacecraft.
2. Invasion of the Dinosaurs - The the Doctor and Sarah-Jane crew arrive in 1970s London to find that it has been evacuated, due to the mysterious appearance of dinosaurs.
3. Death to the Daleks - The Doctor & Sarah are drawn to the planet Exxilon, where they must outwit the native savage Exxilons and a crew of stranded and desperate Daleks in order to survive.
4. The Monster of Peladon - The Doctor returns, this time with Sarah, to the planet Peladon, where once again the sacred beast Aggedor casts its shadow. Also present are the Ice Warriors, but whose side are they really on?
5. Planet of the Spiders - Mysterious goings-on at a meditation retreat run by monks are linked to the blue planet Metebelis III, and a colony of monstrous, evolved spiders. The Doctor must reflect on his past and reconcile with his present to defeat a deadly and possibly fatal challenge...