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: The 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.

February

 * 20 - Judy Cornwell is born.

March

 * 13 - Christopher Gable is born.

April

 * 2 - Sean Barry-Weske is born.
 * 15 - Sean Caffrey is born.
 * 26 - Harry Fielder is born.

May

 * 18 - Ray Lonnen is born.
 * 28 - Frank Cox is born.

June

 * 4 - David Collings is born.
 * 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.

July

 * 7 - Beatle Ringo Starr, who appeared as himself in The Chase, is born in Liverpool.
 * 28 - Brigit Forsyth is born.
 * 31 - Louise Pajo is born.

August

 * 9 - Bernard Holley is born.
 * 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.
 * 12 - Gawn Grainger is born.
 * 29 - Angela Douglas is born.

November

 * 17 - William Simons is born.
 * 24 - Alan Lake is born.

December

 * 11 - Tony Adams is born.
 * 15 - Pennant Roberts is born.

Unknown date

 * Mark Heath, who played Ralph in "The Moonbase," is born in Kingston, Jamaica.
 * Barry Stanton is born.
 * Ben Howard is born.
 * John Gregg is born.
 * John J. Carney is born.
 * R.J. Bell is born.
 * Yvonne Antrobus is born.