Episode list

In the ocean on an alien world, there's a city run by scientists. The Doctor is wants to help them find new ways to produce clean energy. But others have recognized the value of the sea base, and their interest is not so benign.

When the TARDIS is trapped in the Vortex, the Doctor and Adric realize that there is something immensely powerful that is draining time itself from the universe.

Bill Potts has an unexpected visitor: another Bill Potts from the future. Bill summons the Doctor, who confirms that the other Bill is genuine. She has come to see her younger self for a reason - but she can't say what it is.

The Doctor, Ben, and Polly race to escape a frightening lifeless London. But as the city folds in on itself, it is a warning of a far greater danger.

At last, the TARDIS has got it right. The Doctor, Adric, Nyssa and Tegan have landed in London, 1982. And yet - The Palace is home not to a Queen but to an Emperor.

When the TARDIS crashes to earth before his eyes, the Fourth Doctor is reunited with his former self and another Sarah Jane. But are the four of them enough to keep the Sand Box closed and whatever is within from getting out?

The Twelfth Doctor embarks on a desperate search for the three scattered parts of the Triskelia. But two warring races, the Myzen and the Tollatee are also searching for this powerful device, as is a mysterious mercenary.

In 1901, something strange haunts the streets of London. A mysterious carriage appears from nowhere and seems to spirit away the unwary. But to where? When Romana is taken by the carriage, the Doctor teams up with that other redoubtable pair, Jago and Litefoot, to find her. Their investigations lead them to discover an alien plot that could alter history. And before the Doctor can stop it, he must first save his friend.

The Doctor, Liz and the Brigadier investigate the alien "spores" - blobs of deadly mirror matter from the dawn of time. Liz summons fellow scientists to help the investigation. But one is secretly working for the BNKR, an organization preparing to take over the world. The BNKR unleash a killer spore. Meanwhile the Doctor and Liz race to stop another spore, locked in a countdown to destruction. Can the Doctor and his friends prevent the entire Earth being converted into mirror matter?