28 March

History of the Doctor Who Universe

 * 1963 - Lizzie Lewis is murdered by Ed Morgan (TW: Ghost Machine).

History of Doctor Who

 * 1964 - "Mighty Kublai Khan" first broadcast (DW: Marco Polo Episode 6).
 * 1970 - DW: The Ambassadors of Death Episode 2 first broadcast.
 * 1987 - Patrick Troughton dies.