23 September

History of the Doctor Who Universe

 * 1215 - Kublai Khan was born and would later meet the Doctor, Ian Chesterton, Barbara Wright and Susan. (DW: Marco Polo)

History of Doctor Who

 * 1967 - DW: The Tomb of the Cybermen, Episode 4 was first broadcast.


 * 1978 - DW: The Ribos Operation, Part 4 was first broadcast.


 * 2006 - Patrick Tull (One of the voices of the Krotons in DW: The Krotons) died.