1968

December

 * 20 - (NA: The Left-Handed Hummingbird)
 * 23 - The Sentience begins stirring in Crook Marsham. (NA: Nightshade)
 * 24 - The Doctor and Ace arrive in Crook Marsham, and become involved in the fight against the Sentience. (NA: Nightshade)
 * 25 - The final battle against the Sentience takes place. It departs Crook Marsham. (MA: Nightshade)

Unknown dates

 * The United Nations have by this time established protocols for first contact with alien life. (DW: The Sound of Drums)
 * The Monk deposits &pound;200 in a London bank, planning to withdraw it with compound interest in two hundred years (DW: The Time Meddler).
 * The Olympics are held in Mexico City (DW: The Underwater Menace).

January

 * 06 - The Enemy of the World Episode 3 First Broadcast


 * 13 - The Enemy of the World Episode 4 First Broadcast


 * 20 - The Enemy of the World Episode 5 First Broadcast


 * 27 - The Enemy of the World Episode 6 First Broadcast

February

 * 03 - The Web of Fear Episode 1 First Broadcast


 * 10 - The Web of Fear Episode 2 First Broadcast


 * 17 - The Web of Fear Episode 3 First Broadcast


 * 24 - The Web of Fear Episode 4 First Broadcast

March

 * 02 - The Web of Fear Episode 5 First Broadcast


 * 09 - The Web of Fear Episode 6 First Broadcast


 * 16 - Fury from the Deep Episode 1 First Broadcast


 * 23 - Fury from the Deep Episode 2 First Broadcast


 * 30 - Fury from the Deep Episode 3 First Broadcast

April

 * 06 - Fury from the Deep Episode 4 First Broadcast


 * Keith Pyott, who played Autloc in "The Aztecs," dies.


 * 13 - Fury from the Deep Episode 5 First Broadcast


 * 20 - Fury from the Deep Episode 6 First Broadcast


 * 27 - The Wheel in Space Episode 1 First Broadcast

May

 * 04 - The Wheel in Space Episode 2 First Broadcast


 * 11 - The Wheel in Space Episode 3 First Broadcast


 * 18 - The Wheel in Space Episode 4 First Broadcast


 * 25 - The Wheel in Space Episode 5 First Broadcast


 * 28 - Kylie Minogue (Astrid Peth in DW: Voyage of the Damned) is born

June

 * 01 - The Wheel in Space Episode 6 First Broadcast

August

 * 5 - Matt Jones, best known in the Doctor Who world for writing the Doctor Who episodes The Impossible Planet/The Satan Pit and the Torchwood episode Dead Man Walking, is born.


 * 10 - The Dominators Episode 1 First Broadcast


 * 17 - The Dominators Episode 2 First Broadcast


 * 24 - The Dominators Episode 3 First Broadcast


 * 31 - The Dominators Episode 4 First Broadcast

September

 * 07 - The Dominators Episode 5 First Broadcast


 * 14 - The Mind Robber Episode 1 First Broadcast


 * 21 - The Mind Robber Episode 2 First Broadcast


 * 28 - The Mind Robber Episode 3 First Broadcast

October

 * 05 - The Mind Robber Episode 4 First Broadcast


 * 12 - The Mind Robber Episode 5 First Broadcast

November

 * 02 - The Invasion Episode 1 First Broadcast. Terrance Dicks' long association with the Doctor Who franchise begins with this episode, on which he serves as script editor.


 * 09 - The Invasion Episode 2 First Broadcast


 * 16 - The Invasion Episode 3 First Broadcast


 * 23 - The Invasion Episode 4 First Broadcast


 * 30 - The Invasion Episode 5 First Broadcast

December

 * 07 - The Invasion Episode 6 First Broadcast


 * 14 - The Invasion Episode 7 First Broadcast


 * 21 - The Invasion Episode 8 First Broadcast


 * 28 - The Krotons Episode 1 First Broadcast