1966 (releases)

January

 * Dr Who on the Planet Zactus Painting Book was published by World Distributors.
 * Travels in Time Painting Book was published by World Distributors.
 * Doctor Who and the Invasion from Space was published by World Distributors.
 * Doctor Who en de Daleks, the Dutch translation of Doctor Who in an Exciting Adventure with the Daleks, was first published by Uitgeversmij.
 * 1 January - "Volcano", the eighth episode of The Daleks' Master Plan debuted on BBC1.
 * 1 January - The second part of A Christmas Story was first released in TV Comic.
 * 1 January - The fourth part of Eve of War was first published in TV Century 21.
 * 8 January - "Golden Death", the ninth episode of The Daleks' Master Plan debuted on BBC1.
 * 8 January - The third part of A Christmas Story was first published in TV Comic,
 * 8 January - The fifth and final part of Eve of War was first published in TV Century 21.
 * 15 January - "Escape Switch", the tenth episode of The Daleks' Master Plan debuted on BBC1 as the 100th episode released.
 * 15 January - The fourth and final part of A Christmas Story was first published in TV Comic.
 * 15 January - The first part of The Archives of Phryne was first published in TV Century 21.
 * 22 January - "The Abandoned Planet", the eleventh episode of The Daleks' Master Plan debuted on BBC1.
 * 22 January - The first part of The Didus Expedition was first published in TV Comic.
 * 22 January - The second part of The Archives of Phryne was first published in TV Century 21.
 * 29 January - "Destruction of Time", the twelfth and final episode of The Daleks' Master Plan, debuted on BBC1.
 * 29 January - The second part of The Didus Expedition was first published in TV Comic.
 * 29 January - The third part of The Archives of Phryne was first published in TV Century 21.

February

 * 3 February - The Dalek Party was first broadcast on an episode of Blue Peter.
 * 5 February - "War of God", the first episode of The Massacre, debuted on BBC1.
 * 5 February - The third part of The Didus Expedition was first published in TV Comic.
 * 5 February - The fourth part of The Archives of Phryne was first published in TV Century 21.
 * 12 February - "The Sea Beggar", the second episode of The Massacre, debuted on BBC1.
 * 12 February - The fourth and final part of The Didus Expedition was first published in TV Comic.
 * 12 February - The fifth part of The Archives of Phryne was first published in TV Century 21.
 * 19 February - "Priest of Death", the third episode of The Massacre, debuted on BBC1.
 * 19 February - The first part of Space Station Z-7 was first published in TV Comic.
 * 26 February - "Bell of Doom", the fourth and final episode of The Massacre, debuted on BBC1.
 * 26 February - The second part of Space Station Z-7 was first published in TV Comic.
 * 26 February - The sixth and final part of The Archives of Phryne was first published in TV Century 21.

March

 * Dalek Action Paint 'n Puzzle was published by Souvenir Press.
 * Dr. Who Travels in Space Sticker Fun Book was published by World Distributors.
 * Dr. Who Travels in Time Sticker Fun Book was published by World Distributors.
 * Travels in Space Painting Book was published by World Distributors.
 * 5 March - "The Steel Sky", the first episode of The Ark, debuted on BBC1.
 * 5 March - The third part of Space Station Z-7 was first published in TV Comic.
 * 5 March - The first part of The Rogue Planet was first published in TV Century 21.
 * 12 March - "The Plague", the second episode of The Ark, debuted on BBC1.
 * 12 March - The fourth and final part of Space Station Z-7 was first published in TV Comic.
 * 12 March - The second part of The Rogue Planet was first published in TV Century 21.
 * 19 March - "The Return", the third episode of The Ark, debuted on BBC1.
 * 19 March - The first part of Plague of the Black Scorpi was first published in TV Comic.
 * 19 March - The third part of The Rogue Planet was first published in TV Century 21.
 * 26 March - "The Bomb", the fourth episode of The Ark, debuted on BBC1.
 * 26 March - The second part of Plague of the Black Scorpi was first published in TV Comic.
 * 26 March - The fourth and final part of The Rogue Planet was first published in TV Century 21.

April

 * Century 21 Records released a Doctor Who edition of its 21 Minutes of Adventure LP record series. A record named The Daleks featured the audio soundtrack of "The Planet of Decision", a chapter of The Chase. It was the first spoken word Doctor Who product to market. On another release, the Eric Winston version of the Doctor Who theme was featured.
 * 2 April - "The Celestial Toyroom", the first episode of The Celestial Toymaker, debuted on BBC1.
 * 2 April - The third part of Plague of the Black Scorpi was first published in TV Comic.
 * 2 April - The first part of Impasse was first published in TV Century 21.
 * 9 April - "The Hall of Dolls", the second episode of The Celestial Toymaker, debuted on BBC1.
 * 9 April - The fourth and final part of Plague of the Black Scorpi was first published in TV Comic.
 * 9 April - The second part of Impasse was first published in TV Century 21.
 * 16 April - "The Dancing Floor", the third episode of The Celestial Toymaker, debuted on BBC1.
 * 16 April - The first part of The Trodos Tyranny was first published in TV Comic.
 * 16 April - The third part of Impasse was first published in TV Century 21.
 * 23 April - "The Final Test", the fourth and final episode of The Celestial Toymaker debuted on BBC1.
 * 23 April - The fourth part of Impasse was first published in TV Century 21.
 * 23 April - The second part of The Trodos Tyranny was first published in TV Comic.
 * 30 April - "A Holiday for the Doctor", the first part of The Gunfighters, debuted on BBC1.
 * 30 April - The third part of The Trodos Tyranny was first published in TV Comic.
 * 30 April - The fifth part of Impasse was first published in TV Century 21.

May

 * The activity books Puzzle Fun No. 1 and Puzzle Fun No. 2 were published by World Distributors.
 * 7 May - "Don't Shoot the Pianist", the second part of The Gunfighters, debuted on BBC1.
 * 7 May - The fourth part of The Trodos Tyranny was first published in TV Comic.
 * 7 May - The sixth part of Impasse was first published in TV Century 21.
 * 14 May - "Johnny Ringo", the third part of The Gunfighters, debuted on BBC1.
 * 14 May - The fifth and final part of The Trodos Tyranny was first published in TV Comic.
 * 14 May - The seventh and final part of Impasse was first published in TV Century 21.
 * 21 May - "The O. K. Corral", the fourth and final part of The Gunfighters debuted on BBC1, the last individually titled part of a story, excluding charity events, until  Rose  in 2005.
 * 21 May - The first part of The Secret of Gemino was first published in TV Comic.
 * 21 May - The first part of The Terrorkon Harvest was first published in TV Century 21.
 * 28 May - Episode 1 of The Savages debuted on BBC1.
 * 28 May - The second part of The Secret of Gemino was first published in TV Comic.
 * 28 May - The second part of The Terrorkon Harvest was first published in TV Century 21.

June

 * 4 June - Episode 2 of The Savages debuted on BBC1.
 * 4 June - The third part of The Secret of Gemino was first published in TV Comic.
 * 4 June - The third part of The Terrorkon Harvest was first published in TV Century 21.
 * 11 June - Episode 3 of The Savages debuted on BBC1.
 * 11 June - The fourth part of The Secret of Gemino was first published in TV Comic.
 * 11 June - The fourth part of The Terrorkon Harvest was first published in TV Century 21.
 * 18 June - Episode 4 of The Savages debuted on BBC1.
 * 18 June - The fifth and final part of The Secret of Gemino was first published in TV Comic.
 * 18 June - The fifth part of The Terrorkon Harvest was first published in TV Century 21.
 * 25 June - Episode 1 of The War Machines debuted on BBC1.
 * 25 June - The first part of The Haunted Planet was first published in TV Comic.
 * 25 June - The sixth and final part of The Terrorkon Harvest was first published in TV Century 21.

July

 * The film Dr. Who and the Daleks was released to theatres in the United States.
 * 2 July - Episode 2 of The War Machines debuted on BBC1.
 * 2 July - The second part of The Haunted Planet was first published in TV Comic.
 * 2 July - The first part of Legacy of Yesteryear was first published in TV Century 21.
 * 9 July - Episode 3 of The War Machines debuted on BBC1.
 * 9 July - The third part of The Haunted Planet was first published in TV Comic.
 * 9 July - The second part of Legacy of Yesteryear was first published in TV Century 21.
 * 16 July - Episode 4 of The War Machines debuted on BBC1, concluding the third season.
 * 16 July - The fourth part of The Haunted Planet was first published in TV Comic.
 * 16 July - The third part of Legacy of Yesteryear was first published in TV Century 21.
 * 23 July - The fifth and final part of The Haunted Planet was first published in TV Comic.
 * 23 July - The fourth part of Legacy of Yesteryear was first published in TV Century 21.
 * 26 July - Daleks' Invasion Earth 2150 A.D. premiered.
 * 30 July - The first part of The Hunters of Zerox was first published in TV Comic.
 * 30 July - The fifth part of Legacy of Yesteryear was first published in TV Century 21.

August

 * 5 August - The second feature film, Daleks' Invasion Earth 2150 A.D., was released in the UK.
 * 27 August - The fifth and final part of COMIC: The Hunters of Zerox was released.

September

 * September - The second Doctor Who Annual was published.
 * 3 September - The first part of COMIC: The Underwater Robot was released.
 * 3 September - The last part of COMIC: Legacy of Yesteryear was released.
 * 8 September - The Dalek Outer Space Book was published by Souvenir Press and Panther Books.
 * 10 September - Season 4 began with the BBC1 debut of The Smugglers Episode 1.
 * 10 September - The first part of COMIC: Shadow of Humanity was released.
 * 17 September - The Smugglers Episode 2 debuted on BBC1.
 * 24 September - The Smugglers Episode 3 debuted on BBC1. On the same day, TV Comics released the fourth and final part of COMIC: The Underwater Robot.

October

 * 1 October - The Smugglers Episode 4 debuted on BBC1. On the same day, TV Comics released the first part of COMIC: Return of the Trods.
 * 1 October - The last part of COMIC: Shadow of Humanity was released.
 * 8 October - The Tenth Planet Episode 1 debuted on BBC1.
 * 8 October - The first part of COMIC: The Emissaries of Jevo was released.
 * 15 October - The Tenth Planet Episode 2 debuted on BBC1.
 * 22 October - The Tenth Planet Episode 3 debuted on BBC1. On the same day, TV Comics released the fourth and final part of COMIC: Return of the Trods.
 * 29 October - The Tenth Planet Episode 4 debuted on BBC1. On the same day, TV Comics released the first part of COMIC: The Galaxy Games.

November

 * 5 November - The Power of the Daleks Episode 1 debuted on BBC1.
 * 12 November - The Power of the Daleks Episode 2 debuted on BBC1.
 * 12 November - The last part of COMIC: The Emissaries of Jevo was released.
 * 19 November - The Power of the Daleks Episode 3 debuted on BBC1. On the same day, TV Comics released the fourth and final part of COMIC: The Galaxy Games.
 * 19 November - The first part of COMIC: The Road to Conflict was released.
 * 26 November - The Power of the Daleks Episode 4 debuted on BBC1. On the same day, TV Comics released the first part of COMIC: The Experimenters.

December

 * December - US comic book publisher Dell Comics issued Dr. Who and the Daleks, a single-issue adaptation of the film of the same name.
 * 3 December - The Power of the Daleks Episode 5 debuted on BBC1.
 * 10 December - The Power of the Daleks Episode 6 debuted on BBC1.
 * 17 December - The Highlanders Episode 1 debuted on BBC1. On the same day, TV Comics released the fourth and final part of COMIC: The Experimenters.
 * 24 December - The Highlanders Episode 2 debuted on BBC1.
 * 24 December - The first part of COMIC: The Extortioner was released.
 * 31 December - The Highlanders Episode 3 debuted on BBC1.

Unknown dates

 * The TV Comic Annual 1966 containing Prisoners of the Kleptons and The Caterpillar Men was released.
 * The TV Comic Holiday Special 1966 containing Guests of King Neptune and The Gaze of the Gorgon was released.