Midway through the sequence of specials (commencing with " Planet of the Dead"), production switched to filming in high-definition.
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" Music of the Spheres" was filmed for the 2008 Doctor Who Prom in July 2008, and the animated six-episode serial Dreamland was produced for the BBC's Red Button service, which was released over six consecutive days in November 2009.
Two supplemental episodes were also filmed alongside the specials. The specials started production in April 2008 for "The Next Doctor", and filming for the final special "The End of Time" began in March 2009.
The first special was broadcast on 25 December 2008 with " The Next Doctor", with the last special, the two-part episode " The End of Time", broadcasting over two weeks on 25 December 2009 and 1 January 2010. Davies' decision to step down as showrunner. The specials were produced in lieu of a full series in 2009, to allow the new production team for the programme to have enough time to prepare for the fifth series in 2010, in light of Russell T. The 2008–2010 specials of the British science fiction television programme Doctor Who are five specials that linked the programme's fourth and fifth series.