1940

December

 * December - The Doctor visits Guernsey. (NA: Just War)

Unknown date

 * The last in an eight year series of child abductions by the Pied Piper occurs in America. (SJA: Day of the Clown)

January

 * 19 - Mike Reid, who had an uncredited role as a soldier in The War Machines and appeared as Frank Butcher in Dimensions in Time is born in Hackney, London.

June

 * 7 - Ronald Pickup, who played the physician in "The Reign of Terror," is born in Chester, England.
 * 8 - Carole Ann Ford, who portrayed Susan Foreman, is born.
 * 18 - Michael Sheard, who portrayed many memorable characters in one-off roles on Doctor Who, is born in Aberdeen, Scotland.

July

 * 7 - Beatle Ringo Starr, who appeared as himself in The Chase, is born in Liverpool.

August

 * 18 - Barry Justice, who played King Charles IX in The Massacre of St Bartholomew's Eve, is born in Lucknow, India.

September

 * 3 - Pauline Collins, who played Samantha Briggs in The Faceless Ones and Victoria in Tooth and Claw is born in Exmouth, Devon, England.

October

 * 9 - Beatle John Lennon, who appeared as himself in The Chase is born in Liverpool.

Unknown date

 * Mark Heath, who played Ralph in "The Moonbase," is born in Kingston, Jamaica.