12 December

History of the Doctor Who universe

 * 1901 - Cambridge linguist John Lafayette stumbled across a Time Path that led him to ancient Babylon. (BNA: Walking to Babylon)
 * 2360 - The Eleventh Doctor and River Song visit Calderon Beta, where they encounter two future versions of River and one of the Doctor.

History of Doctor Who

 * 1949 - Bill Nighy was born.
 * 1961 - Sarah Sutton (Nyssa, companion of the Fourth and Fifth Doctors) was born.
 * 1964 - "The End of Tomorrow," episode 4 of DW: The Dalek Invasion of Earth, was first broadcast.
 * 1989 - Howard Lang (Horg in DW: An Unearthly Child) died.
 * 2008 - DW: Journey's End was broadcast on the CBC in Canada in an extensively edited version with over 20 minutes of material cut.