Series 5 (Doctor Who)

Series 5, also known as Season 31 for clarity over Season 5, is scheduled for broadcast in 2010. It was commissioned at least as early as September 2007, along with 4 specials to be broadcast between Christmas 2008 and Christmas 2009.

2009 specials
Between the end of Series 4 and the beginning of Series 5 are four specials to be broadcast at various points in 2008-2009. Of the four specials, one has been scheduled for Christmas 2008, one for Easter 2009, and one for Christmas 2009, leaving only one unscheduled as of July 2008. Russell T Davies is solely writing only the Christmas 2008 special and one other, but will co-write the other two. These three specials will be overseen by Davies and Julie Gardner, but traditional line producer, Phil Collinson will not be returning for them. All will reportedly star David Tennant.

Christmas 2008
Little is known about any of the specials as of mid-2008. However, the Christmas 2008 special was teased at the end of Series 4. The Cybus Cybermen are therefore known to be returning. Also, actors Dirvla Kirwan and David Morrissey are involved, as is a probable setting of Victorian England.

Series 5 proper
Davies will not be onboard in any capacity Series 5 itself. He has said he will not write a script for the series, nor be on hand in any advisory capacity.

The involvement of David Tennant — or indeed any other actor — has not been officially announced as of July 2008. However, Tennant is said to have "already made his decision and informed the BBC".

Nevertheless, it is known that at least two key people will be involved. Steven Moffat will be head writer and therefore likely assume Davies' executive producer title. Piers Wenger will relieve Julie Gardner of her executive producer title.