The End of Time is a two-part story from the British science fiction television programme Doctor Who. It was originally broadcast on BBC One in the United Kingdom on 25 December 2009 and 1 January 2010. This is the last story for lead actor David Tennant, who hands over the role of alien time traveller the Doctor to Matt Smith. It is also the last Doctor Who story written and produced by Russell T Davies, who shepherded the series' return to British television in 2005 and served as the series' executive producer and chief writer. Davies was succeeded as executive producer and showrunner by Steven Moffat.