The original series of Doctor Who was first broadcast on 23rd November, 1963, and continuied to be broadcast as an ongoing series (with the exception of an 18-month hiatus) until the transmission of its final episode on the 6th December, 1989.

Season 1	William Hartnell	23/11/63-12/9/64
100,000 BC	The Daleks	The Edge of Destruction
Marco Polo	The Keys of Marinus	The Aztecs
The Sensorites	The Reign of Terror
Season 2	William Hartnell	31/10/64-24/7/65
Planet of Giants	The Dalek Invasion of Earth	The Rescue
The Romans	The Web Planet	The Crusade
The Space Museum	The Chase	The Time Meddler
Season 3	William Hartnell	11/9/65-16/7/66
Galaxy 4	Mission to the Unknown	The Myth Makers
The Daleks' Master Plan	The Massacre	The Ark
The Celestial Toymaker	The Gunfighters	The Savages
Season 4	William Hartnell/ Patrick Troughton	10/9/66-29/10/66, 5/22/66-1/7/67
The Smugglers	The Tenth Planet	The Power of the Daleks
The Highlanders	The Underwater Menace	The Moonbase
The Macra Terror	The Faceless Ones	The Evil of the Daleks
Season 5	Patrick Troughton	2/9/67-1/6/68
The Tomb of the Cybermen	The Abominable Snowmen	The Ice Warriors
The Enemy of the World	The Web of Fear	The Fury from the Deep
The Wheel in Space
Season 6	Patrick Troughton	10/8/68-21/6/69
The Dominators	The Mind Robber	The Invasion
The Krotons	The Seeds of Death	The Space Pirates
The War Games
Season 7	Jon Pertwee	3/1/70-20/6/70
Spearhead from Space	Doctor Who and the Silurians	The Ambassadors of Death
Inferno
Season 8	Jon Pertwee	2/1/71-19/6/71
Terror of the Autons	The Mind of Evil	The Claws of Axos
Colony in Space	The Daemons
Season 9	Jon Pertwee	1/1/72-24/6/72
Day of the Daleks	The Curse of Peladon	The Sea Devils
The Mutants	The Time Monster
Season 10	Jon Pertwee	30/12/72-23/6/73
The Three Doctors	Carnival of Monsters	Frontier in Space
Planet of the Daleks	The Green Death
Season 11	Jon Pertwee	15/12/73-8/6/74
The Time Warrior	Invasion of the Dinosurs	Death to the Daleks
The Monster of Peladon	Planet of Spiders
Season 12	Tom Baker	28/12/74-10/5/75
Robot	The Ark in Space	The Sontaran Experiment
Genesis of the Daleks	Revenge of the Cybermen
Season 13	Tom Baker	30/8/75-6/3/76
Terror of the Zygons	Planet of Evil	Pyramids of Mars
The Android Invasion	The Brain of Morbius	The Seeds of Doom
Season 14	Tom Baker	4/9/76-2/4/77
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 15	Tom Baker	3/9/77-11/3/78
Horror of Fang Rock	The Invisible Enemy	Image of the Fendahl
The Sunmakers	Underworld	The Invasion of Time
Season 16	Tom Baker	2/9/78-24/2/79
The Ribos Operation	The Pirate Planet	The Stones of Blood
The Androids of Tara	The Power of Kroll	The Armageddon Factor
Season 17	Tom Baker	1/9/79-12/01/80
Destiny of the Daleks	City of Death	The Creature from the Pit
Nightmare of Eden	Shada	The Horns of Nimon
Season 18	Tom Baker	30/8/80-21/3/81
The Leisure Hive	Meglos	Full Circle
State of Decay	Warrior's Gate	The Keeper of Traken
Logopolis
Season 19	Peter Davison	4/2/82-30/3/82
Castrovalva	Four to Doomsday	Kinda
The Visitation	Black Orchid	Earthshock
Time-Flight
Season 20	Peter Davison	3/1/83-16/3/83, 25/11/83
Arc of Infinity	Snakedance	Mawdryn Undead
Terminus	Enlightenment	The King's Demons
The Five Doctors
Season 21	Peter Davison/ Colin Baker	5/1/84-16/3/84, 22/3/84-30/3/84
Warriors of the Deep	The Awakening	Frontios
Resurrection of the Daleks	Planet of Fire	The Caves of Androzani
The Twin Dilemma
Season 22	Colin Baker	5/1/85-30/3/85
Attack of the Cybermen	Vengeance on Varos	The Mark of the Rani
The Two Doctors	Timelash	Revelation of the Daleks
Season 23	Colin Baker	6/9/86-6/12/86
The Mysterious Planet	Mindwarp	Terror of the Vervoids
The Ultimate Foe
Season 24	Sylvester McCoy	7/9/87-7/12/87
Time and the Rani	Paradise Towers	Delta and the Bannermen
Dragonfire
Season 25	Sylvester McCoy	5/10/88-4/1/89
Remembrance of the Daleks	The Happiness Patrol	Silver Nemesis
The Greatest Show in the Galaxy
Season 26	Sylvester McCoy	6/9/89-6/12/89
Battlefield	Ghost Light	The Curse of Fenric
Survival