7 May

History of the Doctor Who Universe

 * 1915 - The RMS Lusitania is torpedoed by a German U-boat. ("The Sirens of Time")
 * 1997 - Alexander Christian escapes from his military captors and manages to contact Brigadier Lethbridge-Stewart. The United Kingdom submits to Martian rule and sets up a Provisional Government. ("The Dying Days")

History of Doctor Who

 * 1908 - Valentine Dyall is born
 * 1966 - "Don't Shoot the Pianist" First Broadcast (The Gunfighters Episode 2)
 * 2005 - The Long Game First Broadcast
 * 2008 - The Doctor's Daughter First Broadcast