1991

July

 * 23 - Melanie Bush returned to Brighton after travelling with the Doctor and Sabalom Glitz. (PROSE: Missing, Part One: Business as Usual)

Unknown dates

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

April

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

May

 * Murphy Grumbar, a Dalek operator, died.

June

 * 1 - Milton Subotsky (writer and producer of the Dalek movies) died.
 * 7 - Eric Francis, who played the First Elder in TV: The Sensorites, died.
 * 18 - Ronald Allen (Rago in TV: The Dominators and Ralph Cornish in TV: The Ambassadors of Death) died.
 * 20 - PROSE: 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, died.

July

 * 2 - Don Houghton, who wrote TV: Inferno and TV: The Mind of Evil, died.
 * 18 - PROSE: 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 were published with a higher page count. This book completed the adaptations of the Seventh Doctor era, not counting the 1996 telefilm, which was novelised by BBC Books.
 * 25 - Marvel Comics published 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 were published over the next few years.
 * 26 - Lime Grove Studios were formally closed by the BBC. The buildings remained still standing but empty until they were demolished in 1993.

August

 * 15 - PROSE: Timewyrm: Exodus was first published. This was Terrance Dicks' first original (non-novelisation) Doctor Who novel, and his first since PROSE: Doctor Who - The Space Pirates.
 * 18 - Barbara Leake (Mrs. Farrel in TV: Terror of the Autons) died.
 * 20 - Betty Bowden (Meg Seeley in TV: Spearhead from Space) died at age eighty-six.
 * 23 - Producer Innes Lloyd (from TV: The Celestial Toymaker to TV: The Enemy of the World) died.
 * 26 - The original Pilot Episode of Doctor Who was first broadcast on UK television. This was a version of TV: An Unearthly Child, the first episode of the series, which had been rejected for broadcast.
 * 29 - Dallas Adams (Howard Foster in TV: Planet of Fire) died.


 * 30 - Alan Wheatley, who portrayed the Thal leader Temmosus in TV: The Daleks, died from a heart attack in London.
 * 31 - Gerry Davis, co-creator of the Cybermen, died.

September

 * 15 - PROSE: 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 appeared in longer-format (higher word count) works of the same format as the Virgin Missing Adventures line.

October

 * 17 - PROSE: Timewyrm: Apocalypse was first published.
 * 17 - REF: The Gallifrey Chronicles was first published.
 * 25 - John Stratton, who appeared as Shockeye in TV: The Two Doctors, died.
 * 27 - Paul Erickson, who wrote TV: The Ark with Lesley Scott, as well as its novelisation, died.

November

 * 10 - Tutte Lemkow, who played Kuiju in TV: Marco Polo, Ibrahim in TV: The Crusade and Cyclops in TV: The Myth Makers, died in London.
 * 21 - REF: The Terrestrial Index was first published; it was a follow-up to REF: The Doctor Who Programme Guide.
 * 30 - Sydney White, who played the Bubbleshock girl in TV: Invasion of the Bane, was born.

December

 * REF: Time Lord, a single-volume role-playing game issued by Virgin Publishing, was first published.
 * 05 - PROSE: 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 - This date was the tenth anniversary of the broadcast of TV: A Girl's Best Friend, the pilot for K9 and Company.

Unknown date

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