1991

July
23 - Melanie Bush returned to Brighton after travelling with the Doctor. (ST: Missing, Part One: Business as Usual)

Unknown date

 * Aubrey Prior burned down Kenilworth House. (MA: The Sands of Time)
 * Shaun Brett hired Monica Lewis to aid in building a monument to his deceased father in Alaska. (BFA: The Land of the Dead)
 * A three-inch steel protective wall was added to the cabinet room in 10 Downing Street. (DW: World War Three)

April

 * DW: Spearhead from Space released in the US on VHS.

June

 * 7 - Eric Francis, who played the First Elder in DW: The Sensorites, dies.
 * 20 - NA: Timewyrm: Genesys was first published, launching the Virgin New Adventures line of original Doctor Who fiction, the first ongoing series of original novels based upon the series. The book was initially controversial with readers unaccustomed to adult themes, sexuality and language in Doctor Who. It was also the first volume of a planned four-book story arc, the first time such an extensive story had been attempted in Doctor Who literature.
 * 21 - Ivor Salter, who appeared numerous times on Doctor Who, dies.

July

 * 2 - Don Houghton, who wrote DW: Inferno and DW: The Mind of Evil dies.
 * 18 - DWN: Doctor Who - Battlefield was first published. This was the last Target Books novelisation of a televised serial to be published in the short-page count paperback form in place since 1973. Later serial adaptations will be published with a higher page count. This book completes the adaptations of the Seventh Doctor era, not counting the 1996 telefilm, which will be novelised by BBC Books.
 * 25 - Marvel Comics publishes the Doctor Who Yearbook, an attempt at reviving the Annual concept that had been abandoned by World Distributors after 1985. The experiment was a success and several more Yearbooks will be published over the next few years.

August

 * 15 - NA: Timewyrm: Exodus was first published. This was Terrance Dicks' first original (non-novelisation) Doctor Who novel, and his first since DWN: Doctor Who - The Space Pirates.
 * 18 - Barbara Leake (Mrs. Farrel in DW: Terror of the Autons) dies.
 * 20 - Betty Bowden (Meg Seeley in DW: Spearhead from Space) dies aged eighty-six.
 * 23 - Producer Innes Lloyd (from DW: The Celestial Toymaker to DW: The Enemy of the World) dies.
 * 26 - The original Pilot Episode of Doctor Who was first broadcast on UK television. This was a version of DW: An Unearthly Child, the first episode of the series, which had been rejected for broadcast.
 * 30 - Alan Wheatley, who portrayed the Thal leader Temmosus in DW: The Daleks, dies from a heart attack in London.
 * 31 - Gerry Davis, co-creator of the Cybermen dies

September

 * 15 - DWN: Doctor Who - The Pescatons was first published. This novelisation of the 1976 audio story Doctor Who and the Pescatons was the first and only Target Books novelisation based upon a story that was not produced by the BBC. It was the final release by Target in the "short paperback" format that had been used since the line was launched in 1973. The last remaining Target novelisations would appear in longer-format (higher word count) works of the same format as the Virgin Missing Adventures line.

October

 * 17 - NA: Timewyrm: Apocalypse was first published.
 * REF: The Gallifrey Chronicles was first published.
 * 25 - John Stratton, who appeared as Shockeye in DW: The Two Doctors, dies.

November

 * 10 - Tutte Lemkow, who played Kuiju in DW: Marco Polo, Ibrahim in DW: The Crusade and Cyclops in DW: The Myth Makers, dies in London.
 * 21 - REF: The Terrestrial Index was first published; it was a follow-up to REF: The Doctor Who Programme Guide.

December

 * REF: Time Lord, a single-volume role-playing game issued by Virgin Publishing, was first published.
 * 05 - NA: Timewyrm: Revelation was first published, concluding the first Virgin New Adventures story arc.
 * 06 - Star Trek VI: The Undiscovered Country was released. It was the last Star Trek film to feature all of the cast from the original series.
 * 28 - Tenth anniversary of the broadcast of KAC: A Girl's Best Friend, the pilot for K9 and Company.

Unknown date

 * The Museum of the Moving Image in London hosts a major exhibit dedicated to Doctor Who, featuring audio-visual presentations and props from the series.
 * Silva Screen Records releases a soundtrack CD for DW: The Curse of Fenric. This was the first of several full-serial soundtrack albums Silva Screen would release over the next few years.
 * Doctor Who: Variations on a Theme reissued on CD by Silva Screen Records.