1983

August

 * 19 - Ianto Jones is born.

Undated

 * The Brigadier, now retired and working at Brendon Public School, meets the Doctor and in the ensuing adventure meets his younger self from 1977, causing his younger self to lose all memory of the Doctor and experience a breakdown, while his 1983 self regains his memory. Turlough joins the Doctor on his travels, although unknown to the Doctor, he does so under the orders of the Black Guardian. (DW: Mawdryn Undead)


 * According to the Brigadier, Harry Sullivan is doing "hush-hush" work on behalf of NATO at this time. (DW: Mawdryn Undead)


 * After the Fifth Doctor departs, the Brigadier reactivates his relationship with UNIT (as suggested by DW: The Five Doctors) eventually returning to active duty (at some point before DW: Battlefield).


 * The Doctor and the Brigadier are abducted by Borusa while attending a UNIT reunion. (DW: The Five Doctors)


 * Bernice Summerfield is reunited with her father. (NA: Return of the Living Dad)

January

 * 03 - Arc of Infinity Episode 1 First Broadcast


 * 05 - Arc of Infinity Episode 2 First Broadcast


 * 11 - Arc of Infinity Episode 3 First Broadcast


 * 12 - Arc of Infinity Episode 4 First Broadcast


 * 18 - Snakedance Episode 1 First Broadcast


 * 19 - Snakedance Episode 2 First Broadcast


 * 25 - Snakedance Episode 3 First Broadcast


 * 26 - Snakedance Episode 4 First Broadcast

February

 * 01 - Mawdryn Undead Episode 1 First Broadcast


 * 02 - Mawdryn Undead Episode 2 First Broadcast


 * 08 - Mawdryn Undead Episode 3 First Broadcast


 * 09 - Mawdryn Undead Episode 4 First Broadcast


 * 15 - Terminus Episode 1 First Broadcast


 * 16 - Terminus Episode 2 First Broadcast


 * 20 - Peter Glaze, who played the City Administrator in "The Sensorites" and the Brigadier in a Doctor Who parody segment of Crackerjack!, dies in Dartford, England.


 * 22 - Terminus Episode 3 First Broadcast


 * 23 - Terminus Episode 4 First Broadcast

March

 * 01 - Enlightenment Episode 1 First Broadcast


 * 02 - Enlightenment Episode 2 First Broadcast


 * 08 - Enlightenment Episode 3 First Broadcast


 * 09 - Enlightenment Episode 4 First Broadcast


 * 15 - The King's Demons Episode 1 First Broadcast


 * 16 - The King's Demons Episode 2 First Broadcast


 * 21 - Bruno Langley, who portrayed companion Adam Mitchell, is born in Devon, England.

November

 * 25 - "The Five Doctors" is first broadcast in the UK. A satellite feed of a slightly truncated version was broadcast in the US and Canada on 23 November.

Unknown date

 * Filming for Planet of Fire takes place in Lanzarote, Canary Islands, marking the first time Doctor Who has been filmed outside the European continent.