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 dupicates. (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)
 * Possible birth year of Martha Jones (IDW Doctor Who comic book)

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


 * 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

 * 02 - Frontios Episode 3 First Broadcast


 * 03 - Frontios Episode 4 First Broadcast


 * 08 - Resurrection of the Daleks Episode 1 First Broadcast


 * 15 - Resurrection of the Daleks Episode 2 First Broadcast


 * 23 - Planet of Fire Episode 1 First Broadcast


 * 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


 * 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


 * 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.

May

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

July

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

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.

November

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


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

December

 * 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.