1975 (releases)

January

 * 4 January - Part Two of Robot debuted on BBC1.
 * 4 January - The fifth and last part of The Wanderers was first published in TV Comic.
 * 6 January - The stage play Doctor Who and the Daleks in Seven Keys to Doomsday gave its final performance at the Adelphi Theatre.
 * 11 January - Part Three of Robot debuted on BBC1.
 * 11 January - The first part of Death Flower was first published in TV Comic.
 * 16 January - Doctor Who and the Curse of Peladon, a novelisation of The Curse of Peladon, was first published by Target Books.
 * 18 January - Part Four of Robot debuted on BBC1.
 * 18 January - The second part of Death Flower was first published in TV Comic.
 * 25 January - Part One of The Ark in Space debuted on BBC1.
 * 25 January - The third part of Death Flower was first published in TV Comic.

February

 * 1 February - Part Two of The Ark in Space debuted on BBC1.
 * 1 February - The fourth part of Death Flower was first published in TV Comic.
 * 8 February - Part Three of The Ark in Space debuted on BBC1.
 * 8 February - The fifth part of Death Flower was first published in TV Comic.
 * 15 February - Part Four of The Ark in Space debuted on BBC1.
 * 15 February - The sixth part of Death Flower was first published in TV Comic.
 * 19 February - Doctor Who and the Cybermen, a novelisation of The Moonbase, was first published by Target Books.
 * 22 February - Part One of The Sontaran Experiment debuted on BBC1.
 * 22 February - The seventh part of Death Flower was first published in TV Comic.

March

 * 1 March - Part Two of The Sontaran Experiment debuted on BBC1.
 * 1 March - The eighth part of Death Flower was first published in TV Comic.
 * 8 March - Part One of Genesis of the Daleks debuted on BBC1.
 * 8 March - The ninth part of Death Flower was first published in TV Comic.
 * 13 March - Doctor Who and the Giant Robot, a novelisation of Robot, was first published by Target Books.
 * 15 March - Part Two of Genesis of the Daleks debuted on BBC1.
 * 15 March - The tenth part of Death Flower was first published in TV Comic.
 * 22 March - Part Three of Genesis of the Daleks debuted on BBC1.
 * 22 March - The eleventh and final part of Death Flower was first published in TV Comic.
 * 29 March - Part Four of Genesis of the Daleks debuted on BBC1.
 * 29 March - The first part of Return of the Daleks was first published in TV Comic.

April

 * 5 April - Part Five of Genesis of the Daleks debuted on BBC1.
 * 5 April - The second part of Return of the Daleks was first published in TV Comic.
 * 12 April - Part Six of Genesis of the Daleks debuted on BBC1.
 * 12 April - The third part of Return of the Daleks was first published in TV Comic.
 * 19 April - Part One of Revenge of the Cybermen debuted on BBC1.
 * 19 April - The fourth part of Return of the Daleks was first published in TV Comic.
 * 26 April - Part Two of Revenge of the Cybermen debuted on BBC1.
 * 26 April - The fifth part of Return of the Daleks was first published in TV Comic.

May

 * 3 May - Part Three of Revenge of the Cybermen debuted on BBC1.
 * 3 May - The sixth part of Return of the Daleks was first published in TV Comic.
 * 10 May - Part Four of Revenge of the Cybermen debuted on BBC1.
 * 10 May - The seventh part of Return of the Daleks was first published in TV Comic.
 * 15 May - Doctor Who and the Terror of the Autons, a novelisation of Terror of the Autons, was first published by Target Books.
 * 17 May - The eighth and final part of Return of the Daleks was first published in TV Comic.
 * 24 May - The first part of The Wreckers was first published in TV Comic.
 * 31 May - The second part of The Wreckers was first published in TV Comic.

June

 * 7 June - The third part of The Wreckers was first published in TV Comic.
 * 14 June - The fourth part of The Wreckers was first published in TV Comic.
 * 21 June - The fifth part of The Wreckers was first published in TV Comic.
 * 28 June - The sixth part of The Wreckers was first published in TV Comic.

July

 * 5 July - The seventh part of The Wreckers was first published in TV Comic.
 * 12 July - The eighth part of The Wreckers was first published in TV Comic.
 * 19 July - The ninth and final part of The Wreckers was first published in TV Comic.
 * 26 July - The first part of The Emperor's Spy was first published in TV Comic.

August

 * 2 August - The second part of The Emperor's Spy was first published in TV Comic.
 * 9 August - The third part of The Emperor's Spy was first published in TV Comic.
 * 16 August - The fourth part of The Emperor's Spy was first published in TV Comic.
 * 21 August - Doctor Who and the Green Death, a novelisation of The Green Death, was first published by Target Books.
 * 23 August - The fifth part of The Emperor's Spy was first published in TV Comic.
 * 25 August - Disney Time, hosted by Tom Baker as the Fourth Doctor, was broadcast.
 * 30 August - Part One of Terror of the Zygons debuted on BBC1.
 * 30 August - The sixth part of The Emperor's Spy was first published in TV Comic.

September

 * Doctor Who Annual 1976 was first published by World Distributors.
 * Terry Nation's Dalek Annual 1976 was first published by Souvenir Press.
 * 6 September - Part Two of Terror of the Zygons debuted on BBC1.
 * 6 September - The seventh and final part of The Emperor's Spy was first published in TV Comic.
 * 13 September - Part Three of Terror of the Zygons debuted on BBC1.
 * 13 September - The first part of The Sinister Sea was first published in TV Comic.
 * 20 September - Part Four of Terror of the Zygons debuted on BBC1.
 * 20 September - The second part of The Sinister Sea was first published in TV Comic.
 * 27 September - Part One of Planet of Evil debuted on BBC1.
 * 27 September - The third part of The Sinister Sea was first published in TV Comic.

October

 * 4 October - Part Two of Planet of Evil debuted on BBC1.
 * 4 October - The fourth part of The Sinister Sea was first published in TV Comic.
 * 11 October - Part Three of Planet of Evil debuted on BBC1.
 * 11 October - The fifth part of The Sinister Sea was first published in TV Comic.
 * 16 October - Doctor Who and the Planet of the Spiders, a novelisation of Planet of the Spiders, was first published by Target Books.
 * 18 October - Part Four of Planet of Evil debuted on BBC1.
 * 18 October - The sixth and last part of The Sinister Sea was first published in TV Comic.
 * 25 October - Part One of Pyramids of Mars debuted on BBC1.
 * 25 October - The first part of The Space Ghost was first published in TV Comic.

November

 * 1 November - Part Two of Pyramids of Mars debuted on BBC1.
 * 1 November - The second part of The Space Ghost was first published in TV Comic.
 * 8 November - Part Three of Pyramids of Mars debuted on BBC1.
 * 8 November - The third part of The Space Ghost was first published in TV Comic.
 * 15 November - Part Four of Pyramids of Mars debuted on BBC1.
 * 15 November - The fourth part of The Space Ghost was first published in TV Comic.
 * 20 November - Doctor Who - The Three Doctors, a novelisation of The Three Doctors, was first published by Target Books.
 * 20 November - The Doctor Who Monster Book was first published by Target Books.
 * 22 November - Part One of The Android Invasion debuted on BBC1.
 * 22 November - The fifth part of The Space Ghost was first published in TV Comic.
 * 29 November - Part Two of The Android Invasion debuted on BBC1.
 * 29 November - The sixth and final part of The Space Ghost was first published in TV Comic.

December

 * 6 December - Part Three of The Android Invasion debuted on BBC1.
 * 6 December - The first part of The Dalek Revenge was first published in TV Comic.
 * 13 December - Part Four of The Android Invasion debuted on BBC1.
 * 13 December - The second part of The Dalek Revenge was first published in TV Comic.
 * 20 December - The third part of The Dalek Revenge was first published in TV Comic.
 * 27 December - The fourth part of The Dalek Revenge was first published in TV Comic.

Unknown dates

 * The board game War of the Daleks was first published by Denys Fisher.
 * The 1975 TV Comic Holiday Special, featuring the story The Magic Box, was first published.
 * The 1975 TV Comic Annual, featuring the story Petrified, was first published.