1. Terror of the Zygons: Part One
Aired: Aug 30, 1975 The Doctor, Sarah and Harry return to Earth in response to an emergency space...
2. Terror of the Zygons: Part Two
Aired: Sep 6, 1975 The Zygon traps the Doctor and Sarah in a decompression chamber while Harry i...
3. Terror of the Zygons: Part Three
Aired: Sep 13, 1975 The Doctor and the Brigadier begin to realise who the Zygon imposters among t...
4. Terror of the Zygons: Part Four
Aired: Sep 20, 1975 UNIT attempt to track down the Zygon ship while Broton prepares to have the S...
5. Planet of Evil: Part One
Aired: Sep 27, 1975 The Doctor and Sarah answer a distress call and find themselves on Zeta Minor...
6. Planet of Evil: Part Two
Aired: Oct 4, 1975 The Doctor realises that Zeta Minor lies on the boundary between the universe...
7. Planet of Evil: Part Three
Aired: Oct 11, 1975 The Doctor makes a deal with the Anti-Matter Beast to return all the anti-mat...
8. Planet of Evil: Part Four
Aired: Oct 18, 1975 The Doctor tries to convince Sorenson to sacrifice himself for the rest of th...
9. Pyramids of Mars: Part One
Aired: Oct 25, 1975 The Doctor and Sarah are drawn off course and, instead of UNIT HQ, they arriv...
10. Pyramids of Mars: Part Two
Aired: Nov 1, 1975 The Doctor, Sarah and Laurence try to find a way to sever Sutekh's link to th...
11. Pyramids of Mars: Part Three
Aired: Nov 8, 1975 The Doctor and Sarah try to destroy Sutekh's rocket but the Osiran's mental p...
12. Pyramids of Mars: Part Four
Aired: Nov 15, 1975 Sutekh forces the Doctor to transport Scarman and a mummy to Mars, where the ...
13. The Android Invasion: Part One
Aired: Nov 22, 1975 The Doctor and Sarah return to Earth in the present day to find a strangely d...
14. The Android Invasion: Part Two
Aired: Nov 29, 1975 The Doctor suspects Crayford brought something to Earth in his rocket, as he ...
15. The Android Invasion: Part Three
Aired: Dec 6, 1975 The Doctor is captured by Styggron and left to die in the destruction of the ...
16. The Android Invasion: Part Four
Aired: Dec 13, 1975 The Doctor and Sarah reach Earth and try to warn the research centre about th...
17. The Brain of Morbius: Part One
Aired: Jan 3, 1976 The Tardis lands in a spaceship graveyard on the bleak planet Karn, where The...
18. The Brain of Morbius: Part Two
Aired: Jan 10, 1976 The Sisterhood prepare to sacrifice the Doctor to the Sacred Flame and Sarah ...
19. The Brain of Morbius: Part Three
Aired: Jan 17, 1976 The Doctor attempts to restore the Sacred Flame to prove his good intentions ...
20. The Brain of Morbius: Part Four
Aired: Jan 24, 1976 Morbius goes on the rampage, forcing the Doctor and Solon to team up to try a...
21. The Seeds of Doom: Part One
Aired: Jan 31, 1976 Members of the World Ecology Bureau discover a centuries-old seed pod buried ...
22. The Seeds of Doom: Part Two
Aired: Feb 7, 1976 With a killer Krynoid on the loose, the Doctor, Sarah and the last surviving ...
23. The Seeds of Doom: Part Three
Aired: Feb 14, 1976 Surviving two attempts to end their lives, the Doctor and Sarah seek the iden...
24. The Seeds of Doom: Part Four
Aired: Feb 21, 1976 Sarah is saved from a Krynoid fate and runs off, but the same can't be said f...
25. The Seeds of Doom: Part Five
Aired: Feb 28, 1976 In the interest in self-preservation, Chase's men side with The Doctor agains...
26. The Seeds of Doom: Part Six
Aired: Mar 6, 1976 Chase is obviously under Krynoid control. The Doctor suspects possession but,...
