1978 (releases)

January

 * 7 January - Underworld Part One debuted on BBC1.
 * 7 January - The eighth and final part of COMIC: The Aqua-City was released.
 * 14 January - Underworld Part Two debuted on BBC1.
 * 14 January - The first part of COMIC: The Snow Devils was released.
 * 19 January - PROSE: Doctor Who and the Face of Evil was first published.
 * 21 January - Underworld Part Three debuted on BBC1.
 * 21 January - The second part of COMIC: The Snow Devils was released.
 * 28 January - Underworld Part Four debuted on BBC1.
 * 28 January - The third part of COMIC: The Snow Devils was released.

February

 * 4 February - The Invasion of Time Part One debuted on BBC1.
 * 4 February - The fourth part of COMIC: The Snow Devils was released.
 * 11 February - The Invasion of Time Part Two debuted on BBC1.
 * 11 February - The fifth and final part of COMIC: The Snow Devils was released.
 * 16 February - Doctor Who Discovers: The Conquerors was first published by Target Books.
 * 18 February - The Invasion of Time Part Three debuted on BBC1.
 * 18 February - The first part of COMIC: The Space Garden was released.
 * 25 February - The Invasion of Time Part Four debuted on BBC1.
 * 25 February - The second part of COMIC: The Space Garden was released.

March

 * 4 March - The Invasion of Time Part Five debuted on BBC1.
 * 4 March - The third part of COMIC: The Space Garden was released.
 * 11 March - The Invasion of Time Part Six debuted on BBC1.
 * 11 March - The fourth part of COMIC: The Space Garden was released.
 * 18 March - The fifth and final part of COMIC: The Space Garden was released.
 * 25 March - The first part of COMIC: The Eerie Manor was released.
 * 30 March - PROSE: Doctor Who and the Horror of Fang Rock was first published.

April

 * 1 April - The second and last part of COMIC: The Eerie Manor was released.
 * 8 April - The first part of COMIC: Guardian of the Tomb was released.
 * 15 April - The second part of COMIC: Guardian of the Tomb was released.
 * 20 April - Doctor Who Discovers: Strange and Mysterious Creatures was first published.
 * 22 April - The third part of COMIC: Guardian of the Tomb was released.
 * 29 April - The fourth part of COMIC: Guardian of the Tomb was released.

May

 * 6 May - The fifth part of COMIC: Guardian of the Tomb was released.
 * 13 May - The sixth part of COMIC: Guardian of the Tomb was released.
 * 18 May - PROSE: Doctor Who and the Tomb of the Cybermen was first published.
 * 20 May - The seventh and last part of COMIC: Guardian of the Tomb was released.
 * 27 May - The first part of COMIC: The Image Makers was released.

June

 * 3 June - The second part of COMIC: The Image Makers was released.
 * 10 June - The third part of COMIC: The Image Makers was released.
 * 17 June - The fourth part of COMIC: The Image Makers was released.
 * 24 June - The fifth part of COMIC: The Image Makers was released.
 * 29 June - PROSE: Doctor Who and the Time Warrior was first published.

July

 * 1 July - The sixth and final part of COMIC: The Image Makers was released. Marking the final original TVC's story.
 * 7 July - The first part of the reprinted COMIC: The Duellists was released, featuring the Fourth Doctor.
 * 14 July - The second part of the reprinted COMIC: The Duellists was released.
 * 20 July - PROSE: Doctor Who - Death to the Daleks was first published.
 * 21 July - The third part of the reprinted COMIC: The Duellists was released.
 * 28 July - The fourth and final part of the reprinted COMIC: The Duellists was released.

August

 * 4 August - The first part of the reprinted COMIC: The Amateur was released, featuring the Fourth Doctor.
 * 11 August - The second part of the reprinted COMIC: The Amateur was released.
 * 18 August - The Third part of the reprinted COMIC: The Amateur was released.
 * 25 August - The fourth part of the reprinted COMIC: The Amateur was released.
 * 29 August - Tom Baker and Mary Tamm were interviewed on BBC Radio 2's Pete Murray's Open House.

September

 * September - The Doctor Who Annual 1979 was published.
 * September - Terry Nation's Dalek Annual 1979 was published.
 * 1 September - The fifth part of the reprinted COMIC: The Amateur was released.
 * 2 September - The Ribos Operation Part One debuted on BBC1.
 * 8 September - The sixth part of the reprinted COMIC: The Amateur was released.
 * 9 September - The Ribos Operation Part Two debuted on BBC1.
 * 15 September - The seventh and last part of the reprinted COMIC: The Amateur was released.
 * 16 September - The Ribos Operation Part Three debuted on BBC1.
 * 22 September - The first part of the reprinted COMIC: The Magician was released, featuring the Fourth Doctor.
 * 23 September - The Ribos Operation Part Four debuted on BBC1.
 * 29 September - The second part of the reprinted COMIC: The Magician was released.
 * 30 September - The Pirate Planet Part One debuted on BBC1.

October

 * 6 October - The third part of the reprinted COMIC: The Magician was released.
 * 7 October - The Pirate Planet Part Two debuted on BBC1.
 * 13 October - The fourth part of the reprinted COMIC: The Magician was released.
 * 14 October - The Pirate Planet Part Three debuted on BBC1.
 * 20 October - The fifth part of the reprinted COMIC: The Magician was released.
 * 21 October - The Pirate Planet Part Four debuted on BBC1.
 * 27 October - The sixth part of the reprinted COMIC: The Magician was released.
 * 28 October - The Stones of Blood Part One debuted on BBC1.

November

 * 3 November - The seventh and final part of the reprinted COMIC: The Magician was released.
 * 4 November - The Stones of Blood Part Two debuted on BBC1.
 * 10 November - The first part of the reprinted COMIC: The Wanderers was released, featuring the Fourth Doctor.
 * 11 November - The Stones of Blood Part Three debuted on BBC1.
 * 16 November - Doctor Who and the Android Invasion was first published.
 * 17 November - The second part of the reprinted COMIC: The Wanderers was released.
 * 18 November - The Stones of Blood Part Four debuted on BBC1.
 * 24 November - The third part of the reprinted COMIC: The Wanderers was released.
 * 25 November - The Androids of Tara Part One debuted on BBC1.

December

 * 1 December - The fourth part of the reprinted COMIC: The Wanderers was released.
 * 2 December - The Androids of Tara Part Two debuted on BBC1.
 * 7 December - Doctor Who and the Sontaran Experiment was first published.
 * 8 December - The fifth and final part of the reprinted COMIC: The Wanderers was released.
 * 9 December - The Androids of Tara Part Three debuted on BBC1.
 * 15 December - The first part of the reprinted COMIC: The Metal-Eaters was released, featuring the Fourth Doctor.
 * 16 December - The Androids of Tara Part Four debuted on BBC1.
 * 22 December - The second part of the reprinted COMIC: The Metal-Eaters was released.
 * 23 December - The Power of Kroll Part One debuted on BBC1.
 * 29 December - The third part of the reprinted COMIC: The Metal-Eaters was released.
 * 30 December - The Power of Kroll Part Two debuted on BBC1.

Unknown dates

 * The 1978 TV Comic Annual, featuring the stories Master of the Blackhole and Jackals of Space, was released.