Season Twelve - 1974/1975
4A. Robot: The newly regenerated Doctor battles a giant robot
4C. The Ark in Space: The Wirrrn plan to lay their eggs in the cryogenically preserved people of Earth
4B. The Sontaran Experiment: A Sontaran is running experiments on the humans that have returned to Earth
4E. Genesis of the Daleks: The Doctor is sent on a mission by the Time Lords to destroy the Daleks
MA. A Device of Death: The Doctor and his companions have been scattered across the stars, wiping his memory in the process
4D. Revenge of the Cybermen: The Cybermen plan to destroy Voga, the planet of Gold, and the Vogans
PDA. Wolfsbane: Harry is dead; the Doctor and Sarah try to solve the mystery of his death
Season Thirteen - 1975/1976
4F. Terror of the Zygons: The Zygons plan to take over the Earth by posing as humans
4H. Planet of Evil: A scientist plans to use anti-matter from Zeta-Minor, but an anti-matter entity retaliates
MA. Managra: In Europa, designed thousands of years in the future, historical figures live again
4G. Pyramids of Mars: Egyptian God Sutekh discovers a way to escape from his prison
4J. The Android Invasion: The Kraals create a simulation of Earth using androids in preparation for invasion
4K. The Brain of Morbius: The Tine Lords send the Doctor to Karn to halt Dr. Solon's experiments
MA. Evolution: In Victorian England a macabre scheme to interfere with with human evolution is uncovered
4L. The Seeds of Doom: When a Krynoid seed pod is stolen a Krynoid grows and threatens all animal life
MA. System Shock: Earh, 1998, and a race against time to prevent an alien takeover
Season Fourteen - 1976/1977
4M. The Masque of Mandragora: The Madragora Helix finds a way into the TARDIS and escapes into Italy
4N. The Hand of Fear: After an accident in a quarry Sarah helps Eldrad return to reclaim his heritage
4P. The Deadly Assassin: The Doctor returns to Gallifrey to prevent the President's assassination.. and is accused
NV. Ghost Ship: The TARDIS lands in the most haunted place on Earth, the luxury ocean liner the Queen Mary
PDA. Millennium Shock: 1999: The Millennium Bug not only threatens technology but could be the key to an alien invasion
4Q. The Face of Evil: On an unknown planet the Doctor finds his face on a cliff, and a computer he programmed
4R. The Robots of Death: When people on a sandminer start disappearing the Doctor and Leela are blamed
PDA. Last Man Running: The TARDIS arrives on a violent world where creatures aim for the top of the food chain
PDA. Corpse Marker: Again robots are being programmed to kill. Is the dead genius Taren Capel involved?
4S. The Talons of Weng-Chiang: A series of murders have been committed by a Chinese Tong of the Black Scorpian
PDA. Eye of Heaven: On Easter Island an expedition may lead to ancient powers being invoked
PDA. Psi-ence Fiction: Experiments in the paranormal lead to the questioning of the whole of existence
PDA. Drift: White consumes the New Hampshire landscape - the perfect disguise for ghosts
Season Fifteen - 1977/1978
4V. The Horror of Fang Rock: People start to die soon after a Rutan scount crashes on Earth
4T. The Invisible Enemy: The Doctor becomes infected with the Nucleus of a virus
4X. Image of the Fendahl: A human skull is discovered and found to be over twelve million years old
4W. The Sun Makers: The Usurians have enslaved the human colony on the planet of Pluto
4Y. Underworld: The crew of a Minyan ship are on a quest to find the Minyan race bank
4Z. The Invasion of Time: The Sontarans attempt to invade Gallifrey by using the Vardans
Season Sixteen - 1978/1979 - The Key To Time
5A. The Ribos Operation: The White Guardian selects the Doctor for a special mission - to reassemble the Key to Time
PDA. The Tomb of Valdemar: In the Palace of the Old Ones the way is being prepared for the Dark One's resurrection
5B. The Pirate Planet: A hollow planet has been materlising around planets and draining their life forces
5C. The Stones of Blood: For 4,000 years the Cessair of Diplos has been hiding on Earth
MA. The Shadow of Weng-Chiang: Shanghai, 1930: The Doctor is manipulated into following the Dragon Path
PDA. Heart of TARDIS: A force has been released into the Universe, but the Doctor is more concerned for a friend
5D. The Androids of Tara: Romana becomes the centre of a plan by Grendel to take the throne of Tara
5E. The Power of Kroll: The Doctor and Romana are caught in a feud between refiners and Swampies
5F. The Armageddon Factor: The Black Guardian attempts to take the Key to Time from the Doctor
Season Seventeen - 1979/1980
5J. Desiny of the Daleks: Davros could be the Dalek's way to break a stalemate in their war with the Movellans
5H. The City of Death: Before life began on Earth a Jaggaroth spacecraft exploded, splintering Scaroth through time
5G. The Creature from the Pit: Fearing her monopoly on metals may be threatened imprisons a Tythonus ambassador
MA. The Romance of Crime: Which old enemies of the Doctor are aboard a spaceship on its way to the Rock?
MA. The English Way of Death: The TARDIS warns of time pollution in the summer of 1930, London
5K. Nightmare of Eden: A freak accident causes two ships to become locked together after emerging from Hyperspace
5L. Horns of Nimon: The Nimon promise to restore the Skonnons empire as long as they continue to be supplied
5M. Shada: Skagra plans to learn the location of Shada and exploit the mental powers of Salyavin
PDA. Festival of Death: The Beautiful Death where you can find out what it's like experience death
MA. The Well-Mannered War: Two factions claim the colony of Metralubit; in 200 years not one shot has been fired in anger
Season Eighteen - 1980/1981
5N. The Leisure Hive: The Leisure Hive, home to the sinister Tachyon Recreation Generator
5Q. Meglos: Meglos, afer creating a duplicate of the Doctor, plans to destroy the planet of Tigella
5R. Full Circle: On Alzarius, in E-Space, evolution turns full circle every fifty years
5P. State of Decay: Vampires, the enemy of the Time Lords, try to revive the Great One
5S. Warriors' Gate: The TARDIS is hijacked by a time-sensitive Tharil, Biroc
5T. The Keeper of Traken: The Master, after using all his regenerations, tries to steal the Keeper's power
5V. Logopolis: The Master disturbs the balance on Logopolis starting the end of the Universe
