1966 (releases)


 * 1 January - "Volcano" debuted on BBC1.
 * 8 January - "Golden Death" debuted on BBC1.
 * 15 January - "Escape Switch" debuted on BBC1 as the 100th episode released.
 * 15 January - TV Comic released the final part of comic story A Christmas Story.
 * 22 January - "The Abandoned Planet" debuted on BBC1.
 * 22 January - The first part of COMIC: The Didus Expedition was released.
 * 29 January - "Destruction of Time", the twelfth and final episode of The Daleks' Master Plan , debuted on BBC1.
 * 5 February - "War of God" debuted on BBC1.
 * 12 February - "The Sea Beggar" debuted on BBC1.
 * 12 February - The final part of COMIC: The Didus Expedition was released.
 * 19 February - "Priest of Death" debuted on BBC1.
 * 19 February - The first part of COMIC: Space Station Z-7 was released.
 * 26 February - "Bell of Doom", the last episode of The Massacre of St Bartholomew's Eve, debuted on BBC1.
 * Dalek Action Paint 'n Puzzle was published by Souvenir Press.
 * Dr. Who Travels in Space Sticker Fun Book was published.
 * Dr. Who Travels in Time Sticker Fun Book was published.
 * 5 March - "The Steel Sky", the first episode of The Ark, debuted on BBC1.
 * 12 March - "The Plague" debuted on BBC1.
 * 12 March - The final part of COMIC: Space Station Z-7 was released.
 * 19 March - "The Return" debuted on BBC1.
 * 19 March - The first part of COMIC: Plague of the Black Scorpi was released.
 * 26 March - "The Bomb" debuted on BBC1.
 * 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.
 * 2 April - "The Celestial Toyroom" debuted on BBC1.
 * 9 April - "The Hall of Dolls" debuted on BBC1.
 * 9 April - The final part of COMIC: Plague of the Black Scorpi was released.
 * 16 April - "The Dancing Floor" debuted on BBC1.
 * 16 April - The first part of COMIC: The Trodos Tyranny was released.
 * 23 April - "The Final Test" debuted on BBC1.
 * 30 April - "A Holiday for the Doctor" debuted on BBC1.
 * 7 May - "Don't Shoot the Pianist" debuted on BBC1.
 * 14 May - "Johnny Ringo" debuted on BBC1. On the same day, TV Comics released the fifth and final part of COMIC: The Trodos Tyranny.
 * 21 May - "The O. K. Corral" debuted on BBC1. This was the last Doctor Who episode to have an individual title. On the same day, TV Comics released the first part of COMIC: The Secret of Gemino.
 * 28 May - The Savages Episode 1 debuted on BBC1.
 * 4 June - The Savages Episode 2 debuted on BBC1.
 * 11 June - The Savages Episode 3 debuted on BBC1.
 * 18 June - The Savages Episode 4 debuted on BBC1. On the same day, TV Comics released the fifth and final part of COMIC: The Secret of Gemino.
 * 25 June - The War Machines Episode 1 debuted on BBC1. On the same day, TV Comics released the first part of COMIC: The Haunted Planet.
 * 2 July - The War Machines Episode 2 debuted on BBC1.
 * 9 July - The War Machines Episode 3 debuted on BBC1.
 * 16 July - The War Machines Episode 4 debuted on BBC1, concluding the third season.
 * The film Dr. Who and the Daleks was released to theatres in the United States. It was the first public exhibition of anything related to Doctor Who by Americans, pre-empting transmission of the televised series by the better part of a decade.
 * 23 July - The fifth and final part of COMIC: The Haunted Planet was released.
 * 30 July - The first part of COMIC: The Hunters of Zerox was released.
 * 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 - The second Doctor Who Annual was published.
 * 3 September - The first part of COMIC: The Underwater Robot was released.
 * 8 September - The Dalek Outer Space Book was first published.
 * 10 September - Season 4 began with the BBC1 debut of The Smugglers Episode 1.
 * 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.
 * 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.
 * 8 October - The Tenth Planet Episode 1 debuted on BBC1.
 * 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. This episode features the first appearance of the regeneration process of the Time Lords. On the same day, TV Comics released the first part of COMIC: The Galaxy Games.
 * 5 November - The Power of the Daleks Episode 1 debuted on BBC1.
 * 12 November - The Power of the Daleks Episode 2 debuted on BBC1.
 * 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.
 * 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.
 * 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.
 * 31 December - The Highlanders Episode 3 debuted on BBC1.

Unknown dates

 * Doctor Who and the Invasion from Space was published by World Distributors. A hardcover novella, this was the first publication of an original long-form text story to feature the First Doctor. (It was presumably published prior to October as it featured the First Doctor.)
 * US comic book publisher Dell Comics issued a single-issue adaptation of the Dr. Who and the Daleks film. This was the first appearance of a Doctor Who-related comic book in the US.