Fourth Doctor episode guide. 1974-1981.

Season Twelve - 1974-75
Robot
The Ark in Space
The Sontaran Experiment
Genesis of the Daleks
Revenge of the Cybermen

Season Thirteen - 1975-76
Terror of the Zygons
Planet of Evil
Pyramids of Mars
The Android Invasion
The Brain of Morbius
The Seeds of Doom


Season Fourteen - 1976-77
The Masque of Mandragora
The Hand of Fear
The Deadly Assassin
The Face of Evil
The Robots of Death
The Talons of Weng-Chiang



Season Fifteen - 1977-78
Horror of Fang Rock
The Invisible Enemy
Image of the Fendahl
The Sun Makers
Underworld
The Invasion of Time


Season Sixteen - 1978-79
The Ribos Operation
The Pirate Planet
The Stones of Blood
The Androids of Tara
The Power of Kroll
The Armageddon Factor



Season Seventeen - 1979-80
Destiny of the Daleks
City of Death
The Creature from the Pit
Nightmare of Eden
The Horns of Nimon
Shada (never completed due to industrial action)



Season Eighteen - 1980-81
The Leisure Hive
Meglos


The E-Space Trilogy
Full Circle
State of Decay
Warriors' Gate


The Keeper of Traken
Logopolis