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- TV Show Ended -
There is no Next Episode of Doctor Who planned.
Can the Doctor, now in his fourth incarnation. Recover from his post regenerative trauma to save the Earth from Think Tank and their plot for world domination.
The Doctor and Sarah become convinced Think Tank are behind the electronic component thefts but are unable to stop them carrying out another raid.
Sarah and Kettlewell infiltrate an SRS meeting to try and find out what Miss Winters is up to but there is a surprise in store.
UNIT 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.
The Doctor's attempt to give Harry a trip in the TARDIS sees the two of them and Sarah arriving onboard a space station in the far future, with some rather deadly security mechanisms.
The Doctor and Harry revive the Ark's medtech, Vira, to help Sarah.But when station commander Noah is revived, he becomes suspicious of the newcomers.
Knowing 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.
The Doctor tries to protect the humans still in cryogenic suspension from the Wirrn, who are determined to use Earth as their new breeding ground.
The Doctor, Sarah and Harry teleports to Earth to ensure the planet is safe for the survivors on-board Nerva Beacon to return to Earth and re-inhabit their world. Only to find a Sontaran named Styre has captured a group of humans and conducting experiments on them to discover the human body's weaknesses, as part of the Sontaran's goal for domination of the galaxy.
The 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.
The Doctor and his companions are sent to the planet Skaro by the Time Lords to prevent the creation of the Daleks.
The Doctor and Harry are taken to the Kaled bunker where Davros is preparing to demonstrate the Daleks, while Sarah is captured by the Thals and taken to their city as a slave worker.
The Doctor and Harry head to the Kaled city to alert the authorities to Davros' plans while Sarah and Sevrin are forced to work on the completion of the Thals' rocket.
The 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.
The 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.
Gharman 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.
The Time Ring returns The Doctor, Sarah and Harry to Nerva Beacon thousands of years before they left. Where the Doctor, Sarah and Harry find the Beacon's crew have been wiped out by a space plague, only to discover the crew have been murdered by a cybermat and the culprits are the Cybermen and geologist Professor Kellman who bid to wipe out "Voga" a planet of gold, home of the subterranean Vogans who defeated the Cybermen in a war.
The Doctor transmits Sarah and Harry down to Voga to cure Sarah of the Cybermat's poison but Kellman's sabotage means he is unable to bring them back.
The Cybermen force the Doctor, Stevenson and Lester to carry bombs to the centre of Voga while Sarah, Harry and Tyrum decide to contact Vorus.
The Doctor, Harry and Lester try to destroy the Cybermen's relay device, while the Vogans prepare to destroy Nerva even though Sarah is still on board.