1915

April-May

 * The Doctor is wounded at Gallipoli. (DW: The Sea Devils)

May

 * 7th May - The RMS Lusitania is torpedoed by a German U-boat. (BFA: The Sirens of Time)

August

 * August - The Doctor, Ace and Bernice Summerfield arrive in Haiti. (NA: White Darkness)

Other timelines
In John Smith's possible future, he marries Joan Redfern in this year. (NA: Human Nature, DW: The Family of Blood)

March

 * 21 - Ian Stuart Black is born.

May

 * 20 - Peter Copley is born.

July

 * 20 - Robin Wentworth is born.

September

 * 13 - Alan Bromly, director of The Time Warrior and Nightmare of Eden, is born.
 * 17 - John Witty, the voice of the Computer in The Seeds of Death, is born in Bristol.
 * 22 - Emrys Jones is born.

December

 * 13 - Mary Morris is born.
 * 19 - Simon Lack is born.
 * 21 - James Cairncross, who played Lemaitre in The Reign of Terror and Beta in The Krotons, is born in Dunfermline, Fife, Scotland.