Series 4 (Doctor Who)

The 2009 Specials were broadcast between the end of Series 4 and the beginning of Series 5. The four specials were broadcast at various points in 2009 (though the final special was broadcast in 2010). Of the four specials, one aired at Easter 2009, followed by a second that aired in November, and a third one aired on Christmas 2009 with the final one airing on New Year's Day 2010. These four specials were overseen by Russell T Davies and Julie Gardner, but traditional line producer, Phil Collinson, did not return for them. All starred David Tennant. For the 2009 Specials, the Doctor was traveling alone, with each story featuring a one-off companion.

There had been conflicting reports given as to why the decision was made to take a year off. Initial media reports suggested that this was in order to allow David Tennant to perform a season of Shakespeare during the time a regular season would have normally entered production. However, these reports were directly contradicted in Russell T Davies' book Doctor Who: The Writer's Tale, which contains correspondence from the spring of 2007; months before the gap year plan was announced; in which Davies indicated that the intent was to take the series off for a year, except for a few specials, in order to allow a new production team to make its transition, as Davies had already informed the BBC that he would not executive-produce a fifth season.

Animated special
Dreamland was a serialized animated story initially made available on the BBC's Red Button service before being televised in December 2009. Its writer has stated it takes place after the events of The Waters of Mars but it is not officially considered one of the Specials.

David Tennant also appeared as the Doctor in an episode of The Sarah Jane Adventures entitled The Wedding of Sarah Jane Smith. This is not considered part of the 2009 Specials, either.

The Next Doctor
The status of the 2008 Christmas special The Next Doctor is a matter of debate. Officially, it has been called the 14th episode of Series 4, however as noted below, the 4th series numbering also applies to the specials. Conversely, The Next Doctor was produced during the same production block as Series 4, and also was produced differently than the specials, which were shot in high definition. It remains to be seen if over time The Next Doctor becomes accepted as a 4th season episode, as one of the 2009 specials, or as a complete standalone.BBC Video has also announced that it will be included in the forthcoming Specials box set on DVD and Blu-Ray, placing it with the 2009 Specials; in the past, BBC Video's titling and programming has come to be considered definitive. The Proms episode Music of the Spheres is also up for debate as regards whether it Series 4 or part of the Specials

Primary Cast

 * Tenth Doctor - David Tennant

Secondary Cast

 * Lady Christina De Souza - Michelle Ryan
 * Adelaide Brooke - Lindsay Duncan
 * Wilfred Mott - Bernard Cribbins

Guest Cast

 * Professor Malcolm Taylor - Lee Evans
 * Carmen - Ellen Thomas
 * Captain Erisa Magambo - Norma Dumezweni
 * Barclay - Daniel Kaluuya
 * Nathan - David Ames
 * Ed Gold - Peter O'Brien
 * Mia Bennett - Gemma Chan
 * Yuri Kerenski - Aleksander Mikic
 * Andy Stone - Alan Ruscoe
 * Tarak Ital - Chook Sibtain
 * The Master - John Simm
 * The Narrator - Timothy Dalton
 * Donna Noble - Catherine Tate
 * Sylvia Noble - Jacqueline King

Introducing

 * Eleventh Doctor - Matt Smith

Novels

 * The Eyeless
 * Judgement of the Judoon
 * The Slitheen Excursion
 * Prisoner of the Daleks
 * The Taking of Chelsea 426
 * The Krillitane Storm
 * Autonomy
 * Code of the Krillitanes

Audiobooks

 * The Rising Night
 * The Day of the Troll
 * The Last Voyage

Aliens and Enemies

 * The Swarm
 * Tritivores
 * Macmillan
 * The Flood
 * The Master
 * Rassilon
 * Ood
 * Ood Sigma
 * Ood Elder
 * Judoon
 * Vinvocci
 * Time Lords
 * Trefusis
 * The Governor
 * Joshua Naismith
 * Sontaran
 * Hath
 * Sycorax
 * Adipose
 * Slitheen
 * Graske

UK Releases

 * Planet of the Dead was released in the UK BBC DVD and Blu-ray on the 29th June 2009 -- it is the first Doctor Who story to be released in Blu-Ray.
 * All the specials, plus The Next Doctor and Doctor Who at the Proms (including Music of the Spheres) was released in a box set in both Blu-Ray and DVD format on 11th January 2010; The Next Doctor was upconverted to high-definition for the release, the first Doctor Who episode to undergo this process.
 * The Waters of Mars and The End of Time were also released separately on DVD/Blu-Ray on 11th January.
 * Doctor Who: The Complete Specials was released on UK DVD and Blu-ray on the 11th January 2009 - the Box Set consisted of 5 discs, which was The Next Doctor, Planet of the Dead, The Waters of Mars, The End of Time Part 1 and The End of Time Part 2, each on a separate disc. They each contained the special features that were released on the single DVD's.
 * Dreamland will be released on UK DVD and Blu-ray on the 1st February 2010. The official cover and special features are TBA.

International Releases

 * Planet of the Dead was released in North America on 28th July 2009 in both DVD and Blu-Ray formats -- the first Doctor Who story to be released in high definition.
 * It has been announced that the four specials plus The Next Doctor and Doctor Who at the Proms/Music of the Spheres will be released in North America on both DVD and Blu-Ray in a box set on 2nd February 2010. As with the UK release, The Next Doctor is being upconverted to high-definition for the release.
 * The Waters of Mars and The End of Time will also be available separately on DVD/Blu-Ray on 2nd February.