Season 12
20 episodes · Dec 28, 1974
All the stories in this season were interconnected, several forming a loose story arc relating to Space Station Nerva. The Cybermen returned to the series for the first time since The Invasion. Genesis of the Daleks, a story which introduced Davros and showed the creation of the Daleks, is one of the most famous of all Doctor Who serials.
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S12E1Robot (1)
Dec 28, 197425mThe Doctor changes form again. Before he has fully re-covered, something of colossal strength steals a secret weapon, and the convalescent Doctor starts to investigate.
S12E2Robot (2)
Jan 4, 197525mThe Doctor and Sarah Jane become convinced Think Tank are behind the electronic component thefts but are unable to stop them carrying out another raid.
S12E3Robot (3)
Jan 11, 197525mSarah Jane and Kettlewell infiltrate an SRS meeting to try and find out what Miss Winters is up to but there is a surprise in store.
S12E4Robot (4)
Jan 18, 197525mUNIT attempt to get into the bunker to stop Miss Winters setting off the world's nuclear missiles but first they have to get past the K1.
S12E5The Ark in Space (1)
Jan 25, 197525mThe Doctor's attempt to give Harry a trip in the TARDIS sees the two of them and Sarah Jane arriving onboard a space station in the far future, with some rather deadly security mechanisms.
S12E6The Ark in Space (2)
Feb 1, 197525mThe Doctor and Harry revive the Ark's medtech, Vira, to help Sarah Jane. But when station commander Noah is revived, he becomes suspicious of the newcomers.
S12E7The Ark in Space (3)
Feb 8, 197525mKnowing that Noah has been infected by the Wirrn, the Doctor persuades Vira to halt the reviving of her people, knowing it will place them in danger as well.
S12E8The Ark in Space (4)
Feb 15, 197525mThe Doctor tries to protect the humans still in cryogenic suspension from the Wirrn, who are determined to use Earth as their new breeding ground.
S12E9The Sontaran Experiment (1)
Feb 22, 197525mThe Doctor, Sarah Jane and Harry teleport to Earth to ensure the planet is safe for the survivors on board Nerva Beacon to return and reinhabit their world. A Sontaran named Styre has captured a group of humans and is conducting experiments on them to discover the human body's weaknesses, as part of the Sontaran's goal for domination of the galaxy.
S12E10The Sontaran Experiment (2)
Mar 1, 197525mThe Doctor learns that Styre has been experimenting on the Galsec crewmembers to pave the way for a Sontaran invasion of Earth and decides the only way to halt his plans is to challenge him to a duel.
S12E11Genesis of the Daleks (1)
Mar 8, 197525mThe planet Skaro, the distant past. The Time Lords divert the Doctor, Sarah Jane and Harry to this war-torn world, and give the Doctor a mission: the evil of the Daleks is about to be born here, and the Doctor is to try to ensure they evolve into less lethally aggressive beings - or, failing that, to avert their creation altogether. But has even the Doctor the right to commit genocide?
S12E12Genesis of the Daleks (2)
Mar 15, 197525mThe Doctor and Harry are taken to the Kaled bunker where Davros is preparing to demonstrate the Daleks, while Sarah Jane is captured by the Thals and taken to their city as a slave worker.
S12E13Genesis of the Daleks (3)
Mar 22, 197525mThe Doctor and Harry head to the Kaled city to alert the authorities to Davros' plans while Sarah Jane and Sevrin are forced to work on the completion of the Thals' rocket.
S12E14Genesis of the Daleks (4)
Mar 29, 197525mThe Doctor fails to prevent the Thals from destroying the Kaled city but they don't have long to enjoy their victory before the Daleks attack.
S12E15Genesis of the Daleks (5)
Apr 5, 197525mThe Doctor is forced to give Davros full details of future Dalek victories but opposition to Davros' plans is growing among the Kaleds and soon there is open rebellion.
S12E16Genesis of the Daleks (6)
Apr 12, 197525mGharman tries to convince the Kaleds to vote against the Dalek project but Davros has a trick up his sleeve, while the Doctor works to destroy the tape recording of Dalek victory and the Thals plan an intervention of their own.
S12E17Revenge of the Cybermen (1)
Apr 19, 197525mThe orbit of Jupiter, the 25th century. Arriving back on the Nerva Beacon much earlier in history, the Doctor and his friends discover the satellite beset by space plague while its crew struggles to keep space traffic away from Voga, the newest moon of Jupiter. But what is the connection between Voga, the plague, and some old enemies of the Doctor?
S12E18Revenge of the Cybermen (2)
Apr 26, 197525mThe Doctor transmits Sarah Jane and Harry down to Voga to cure Sarah Jane of the Cybermat's poison but Kellman's sabotage means he is unable to bring them back.
S12E19Revenge of the Cybermen (3)
May 3, 197525mThe Cybermen force the Doctor, Stevenson and Lester to carry bombs to the centre of Voga while Sarah Jane, Harry and Tyrum decide to contact Vorus.
S12E20Revenge of the Cybermen (4)
May 10, 197525mThe Doctor, Harry and Lester try to destroy the Cybermen's relay device, while the Vogans prepare to destroy Nerva even though Sarah Jane is still on board.