1991 (releases)

== January ==
* 24 January - DWM 170 was released.
== February ==
* 21 February - DWM 171 was released.
== March ==
* 21 March - DWM 172 was released.
== April ==
* April - Spearhead from Space was released in the US on VHS.
* Doctor Who - Variations on a Theme was reissued on CD by Silva Screen Records.
* 18 April - DWM 173 was released.
== May ==
* 16 May - DWM 174 was released.
== June ==
* 13 June - DWM 175 was released.
* 20 June - PROSE: Timewyrm: Genesys was first published.
== July ==
* July - Doctor Who Magazine Summer Special 1991 was published.
* 5 July - The Doctor Who exhibition Behind the Sofa opened at MOMI in London.
* 11 July - DWM 176 was released.
* 18 July - PROSE: Doctor Who - Battlefield was first published.
* 25 July - Marvel Comics published the Doctor Who Yearbook.
== August ==
* 8 August - DWM 177 was released.
* 15 August - PROSE: Timewyrm: Exodus was first published.
* 26 August - The original Pilot Episode of Doctor Who debuted on BBC1 on UK television.
== September ==
* 5 September - DWM 178 was released.
* 15 September - PROSE: Doctor Who - The Pescatons was first published.
== October ==
* 3 October - DWM 179 was released.
* 17 October - PROSE: Timewyrm: Apocalypse was first published.
* 17 October - REF: The Gallifrey Chronicles was first published.
* 31 October - DWM 180 was released.
== November ==
* November - Doctor Who Magazine Winter Special of 1991 was published.
* 1 November - Who on Earth is Tom Baker was released.
* 21 November - REF: The Terrestrial Index was first published.
* 28 November - DWM 181 was released.
== December ==
* December - REF: Time Lord, a single-volume role-playing game issued by Virgin Publishing, was first published.
* 1 December - Who on Earth is Tom Baker was released directly to VHS.
* 5 December - PROSE: Timewyrm: Revelation was first published.
* 26 December - DWM 182 was released.
== Unknown dates ==
* Unknown - Silva Screen Records released a soundtrack CD for The Curse of Fenric.