1986

September

 * 06 - The Mysterious Planet Episode 1 First Broadcast (The Trial of a Time Lord Episode 1)


 * 13 - The Mysterious Planet Episode 2 First Broadcast (The Trial of a Time Lord Episode 2)


 * 20 - The Mysterious Planet Episode 3 First Broadcast (The Trial of a Time Lord Episode 3)


 * 27 - The Mysterious Planet Episode 4 First Broadcast (The Trial of a Time Lord Episode 4)

October

 * 04 - Mindwarp Episode 1 First Broadcast (The Trial of a Time Lord Episode 5)


 * 11 - Mindwarp Episode 2 First Broadcast (The Trial of a Time Lord Episode 6)


 * 18 - Mindwarp Episode 3 First Broadcast (The Trial of a Time Lord Episode 7)


 * 25 - Mindwarp Episode 4 First Broadcast (The Trial of a Time Lord Episode 8)


 * 28 - Ian Marter, who played companion Harry Sullivan, dies from a diabetes-related heart attack in London.

November

 * 01 - Terror of the Vervoids Episode 1 First Broadcast (The Trial of a Time Lord Episode 9)


 * 08 - Terror of the Vervoids Episode 2 First Broadcast (The Trial of a Time Lord Episode 10)


 * 15 - Terror of the Vervoids Episode 3 First Broadcast (The Trial of a Time Lord Episode 11)


 * 22 - Terror of the Vervoids Episode 4 First Broadcast (The Trial of a Time Lord Episode 12)


 * 29 - The Ultimate Foe Episode 1 First Broadcast (The Trial of a Time Lord Episode 13)

December

 * 06 - The Ultimate Foe Episode 2 First Broadcast (The Trial of a Time Lord Episode 14)

Unknown date

 * John Flint, who played William des Preaux in "The Crusade" and Captain Urquhart in "Time-Flight," dies.

History of the Doctor Who Universe

 * Rose Tyler is born.