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)

September

 * 13 - Alan Bromly, Director of The Time Warrior and Nightmare of Eden) is born.
 * 15 - John Witty, the voice of the Computer in The Seeds of Death, is born in Bristol.

December

 * 21 - James Caircross, who played Lemaitre in The Reign of Terror and Beta in The Krotons, is born in Dunfermline, Fife, Scotland.