Broadcast January 3 - June 20, 1970
All change! Debuts for the Third Doctor, Liz Shaw (for just this season), Autons and Silurians plus a switch from black and white to colour episodes made this a year to remember!
Broadcast January 2 - June 19, 19721
The Master arrives and battles the Doctor in every story this season. Plus, Jo Grant and Captain Yates are introduced and help the Brigadier fight Autons, Axons and Daemons.
Broadcast January 1 - June 24, 1972
The Daleks return after a 5-year absence and the Ice Warriors are back! We meet the Silurians' marine cousins, the mysterious Sea Devils, and the TARDIS takes a trip to Atlantis.
Broadcast December 30, 1972 - June 23, 1973
After saving the galaxy alongside the first two Doctors, the Doctor regains control of his TARDIS and meets Draconians, Daleks and giant maggots... but says farewell to Jo.
Broadcast December 15, 1973 - June 8, 1974
It's the end of the Third Doctor's era in a season which introduces Sarah Jane Smith and the Sontarans. Plus, there are battles against Daleks, dinosaurs and Ice Warriors!
Broadcast December 28, 1974 - May 10, 1975
Alongside Sarah and Harry Sullivan, the Fourth Doctor tries to avert the genesis of the Daleks and in deep space he faces Cybermen, Vogans and the deadly Wirrn!
Broadcast August 30, 1975 - March 6, 1976
As Harry says goodbye, the Doctor and Sarah face everything from Egyptian mummies, an evil Time Lord, android duplicates, a flesh-eating plant and the Loch Ness Monster!
Broadcast September 4, 1976 - April 2, 1977
Adventures across time and space with the time-travelling hero.
Broadcast September 3, 1977 - March 11, 1978
K-9 is introduced in a season that opens with a Rutan invading Earth and finishes with Sontarans storming the Doctor’s home planet of Gallifrey - where Leela decides to stay.
Broadcast September 2, 1978 - February 24, 1979
The White Guardian sends the Doctor on quest to find the six, scattered segments that comprise the powerful Key to Time. He’s aided by K-9 and fellow Time Lord, Romana.
Broadcast September 1, 1979 - January 12, 1980
The Doctor, K-9 and a new incarnation of Romana meet the Nimon, Erato, the Mandrells, Movellans, Daleks and take a trip to Paris where the Doctor finds a stash of Mona Lisas!
Broadcast August 30, 1980 - March 21, 1981
The Fourth Doctor's farewell season saw the Master return and Romana and K-9 elect to remain in E-Space. There were new companions in the shape of Adric, Nyssa and Tegan Jovanka.