December 28, 1974 • 25m
Can the Doctor, now in his fourth incarnation, recover from his post regenerative trauma to save the Earth from Think Tank and the...Read more
January 4, 1975 • 25m
The Doctor and Sarah Jane become convinced Think Tank are behind the electronic component thefts but are unable to stop them carry...Read more
January 11, 1975 • 25m
Sarah 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.
January 18, 1975 • 25m
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.
January 25, 1975 • 25m
The 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 th...Read more
February 1, 1975 • 25m
The Doctor and Harry revive the Ark's medtech, Vira, to help Sarah Jane. But when station commander Noah is revived, he becomes su...Read more
February 8, 1975 • 25m
Knowing that Noah has been infected by the Wirrn, the Doctor persuades Vira to halt the reviving of her people, knowing it will pl...Read more
February 15, 1975 • 25m
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.
February 22, 1975 • 25m
The Doctor, Sarah Jane and Harry teleport to Earth to ensure the planet is safe for the survivors on board Nerva Beacon to return ...Read more
March 1, 1975 • 25m
The Doctor learns that Styre has been experimenting on the Galsec crewmembers to pave the way for a Sontaran invasion of Earth and...Read more
March 8, 1975 • 25m
The planet Skaro, the distant past. The Time Lords divert the Doctor, Sarah Jane and Harry to this war-torn world, and give the Do...Read more
March 15, 1975 • 25m
The Doctor and Harry are taken to the Kaled bunker where Davros is preparing to demonstrate the Daleks, while Sarah Jane is captur...Read more
March 22, 1975 • 25m
The Doctor and Harry head to the Kaled city to alert the authorities to Davros' plans while Sarah Jane and Sevrin are forced to wo...Read more
March 29, 1975 • 25m
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.
April 5, 1975 • 25m
The Doctor is forced to give Davros full details of future Dalek victories but opposition to Davros' plans is growing among the Ka...Read more
April 12, 1975 • 25m
Gharman tries to convince the Kaleds to vote against the Dalek project but Davros has a trick up his sleeve, while the Doctor work...Read more
April 19, 1975 • 25m
The orbit of Jupiter, the 25th century. Arriving back on the Nerva Beacon much earlier in history, the Doctor and his friends disc...Read more
April 26, 1975 • 25m
The Doctor transmits Sarah Jane and Harry down to Voga to cure Sarah Jane of the Cybermat's poison but Kellman's sabotage means he...Read more
May 3, 1975 • 25m
The 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.
May 10, 1975 • 25m
The Doctor, Harry and Lester try to destroy the Cybermen's relay device, while the Vogans prepare to destroy Nerva even though Sar...Read more