1984

May

 * The Doctor defeats the Malus in Little Hodcombe. (DW: The Awakening)

Unknown Date

 * H.C. Clements is bought by the Torchwood Institute.
 * The Fifth Doctor, Tegan and Turlough arrive in London where they encounter canisters of Movellan virus and Dalek duplicates. (DW: Resurrection of the Daleks)
 * Turlough returns to Trion and Peri Brown joins the Doctor on his travels and Kamelion is destroyed. (DW: Planet of Fire)
 * Martha Jones is born.
 * Lucie Miller's Auntie Pat was killed by Zygons and replaced by her Zygon husband Trevor. (BFA: Grand Theft Cosmos)

January

 * 05 - Warriors of the Deep Episode 1 First Broadcast


 * 06 - Warriors of the Deep Episode 2 First Broadcast


 * 12 - Warriors of the Deep Episode 3 First Broadcast
 * Doctor Who - Mawdryn Undead First Published.


 * 13 - Warriors of the Deep Episode 4 First Broadcast


 * 19 - The Awakening Episode 1 First Broadcast


 * 20 - The Awakening Episode 2 First Broadcast


 * 26 - Frontios Episode 1 First Broadcast


 * 27 - Frontios Episode 2 First Broadcast
 * Douglas Camfield Dies

February

 * Doctor Who Monthly changes its title to Doctor Who Magazine.


 * 02 - Frontios Episode 3 First Broadcast


 * 03 - Frontios Episode 4 First Broadcast


 * 08 - Resurrection of the Daleks Episode 1 First Broadcast. Due to a scheduling issue, Resurrection of the Daleks is reedited into two 50-minute episodes rather than the usual 4 25-minute episodes. These are the first "double-length" episodes; the format would be adopted full time in the next season.


 * 15 - Resurrection of the Daleks Episode 2 First Broadcast. Janet Fielding leaves the series with this episode.


 * 23 - Planet of Fire Episode 1 First Broadcast. Nicola Bryant debuts as new companion Peri Brown.


 * 24 - Planet of Fire Episode 2 First Broadcast

March

 * 01 - Planet of Fire Episode 3 First Broadcast


 * 02 - Planet of Fire Episode 4 First Broadcast. Kamelion is destroyed and Mark Strickson leaves the series.


 * 08 - The Caves of Androzani Episode 1 First Broadcast


 * 09 - The Caves of Androzani Episode 2 First Broadcast


 * 15 - The Caves of Androzani Episode 3 First Broadcast
 * Doctor Who - Kinda First Published. This is the last fully photographic Peter Davison cover.


 * 16 - The Caves of Androzani Episode 4 First Broadcast, ending in Peter Davison's regeneration into Colin Baker


 * 17 - John Dearth, who provided the voice of BOSS in The Green Death and portrayed Lupton in Planet of the Spiders dies.


 * 22 - The Twin Dilemma Episode 1 First Broadcast. A slight modification is made to the series logo, adding a prism effect (which creates the effect of it being curved); the logo used for merchandising, however, remains as per the version introduced in 1980.


 * 23 - The Twin Dilemma Episode 2 First Broadcast


 * 27 - Derek Francis, who played Nero in "The Romans," dies from a heart attack in Wimbledon.


 * 29 - The Twin Dilemma Episode 3 First Broadcast


 * 30 - The Twin Dilemma Episode 4 First Broadcast. Last half-hour episode until 1986. The 1984 season marks the end of the show's 24-episode long seasons. Beginning in 1985 the number of episodes is reduced to 13, later 14. A similar episode count would persist when the series revived in 2005.

April

 * 22 - Michelle Ryan born.

May

 * 03 - Doctor Who - Snakedance First Published. With this release, Target Books returns to using artistic covers, although for this and the next Fifth Doctor novelisation, a modified series logo incorporating a photograph of Peter Davison is utilized.


 * 15 - Tom Baker guest stars in the American TV series, Remington Steele, in the episode "Hounded Steele".


 * 24 - Doctor Who - Enlightenment First Published. A rare occasion where more than one novelisation has been published at different times within the same calendar month. Second and last use of the modified logo-and-photo branding for a Fifth Doctor novelisation, and the final use of a photographic element on a Doctor Who fiction book until the 1988 novelisation of Time and the Rani. As Target was not allowed to feature artistic renderings of Peter Davison at the time, this was the last appearance of an image of the Fifth Doctor on a new novelisation, although Target would finally be allowed to feature drawings of Davison when it issued new editions of many of its novelisations in the early 1990s. Target subsequently chose not to include images of the Sixth Doctor on initial releases of any of that era's novelisations; therefore, an image of the current Doctor would not appear again on the cover of a newly issued Target novelisation until Paradise Towers was published in December 1988.

July

 * 11 - Hugh Morton, who played Sir James Gregson in The Seeds of Death dies.


 * 19 - Doctor Who - The Dominators First Published. First non-Fifth Doctor novelisation in two years.

August

 * Doctor Who Annual 1985 published.
 * 16 - Doctor Who - Warriors of the Deep First Published. First fully-artistic Fifth Doctor novelisation cover.

September

 * 20 - Doctor Who - The Aztecs First Published.

October

 * 10 - Joan Young, who played Catherine de Medici in The Massacre of St Bartholomew's Eve dies.
 * Alan Lake (Herrick in Underworld) commits suicide.


 * 18 - Doctor Who - Inferno First Published.
 * The Doctor Who Pattern Book First Published
 * Marvel Comics in the United States launches the monthly comic book Doctor Who, featuring colorized reprints of comic strips and other features from Doctor Who Magazine. Initially, Fourth Doctor material is featured, with Fifth Doctor material following the next year.

November

 * 7 - Hayden Jones, who provided the Auton voice in Terror of the Autons as well as playing Lenny Vosper in the following story, The Mind of Evil, dies.


 * 15 - Doctor Who - The Highlanders First Published.
 * Doctor Who: Brain Teasers and Mind Benders first published by Target Books, written by 16-year-old fan Adrian Heath.


 * 20 - Peter Welch, who played the Sergeant in "The Highlanders" and Morgan in "The Android Invasion," dies in Hammersmith, England.

December

 * 10 - Doctor Who - Frontios First Published.


 * 25 - Georgia Moffett, daughter of Peter Davison is born. After unsuccessfully trying out for the role of Rose Tyler, Moffett would later play Jenny in The Doctor's Daughter.

Unknown date

 * Dennis Cleary, who took the part of a peasant in The Reign of Terror, dies.