The 2008–2010 specials of the British science fiction television programme Doctor Who are series of five specials that linked the programme's fourth and fifth series. The specials were produced in lieu of a full series in 2009, to allow the new production team for the programme enough time to prepare for the fifth series in 2010, in light of Russell T Davies's decision to step down as showrunner, with Steven Moffat taking his place in the fifth series. Preceded by the 2008 Christmas Special, "The Next Doctor", the first special, "Planet of the Dead", was aired on 11 April 2009, the second special "The Waters of Mars", was aired on 15 November 2009, with the last special, the two-part episode "The End of Time", broadcasting over two weeks on 25 December 2009 and 1 January 2010.

The fourth series of British science fiction television programme Doctor Who was preceded by the 2007 Christmas special "Voyage of the Damned". Following the special, a regular series of thirteen episodes aired, starting with "Partners in Crime" on 5 April 2008 and ending with "Journey's End" three months later on 5 July 2008. The series incorporates a loose story arc consisting of recurring mentions of the disappearance of various planets and moons.