The BBC has released a preview of the upcoming Doctor Who special “The Waters of Mars”, which is set to air “Novemberish” according to exiting producer Russel T. Davies. You can view the clip below, assuming the BBC doesn’t yank it from YouTube.
So far there’s not a lot of official details about the story, beyond the casting of Lindsay Duncan as the Doctor’s companion for the story, and the obvious information that it’s set on Mars. We know that Duncan will be playing the head of Mars Base, and will not welcome the Doctor’s arrival.
Well, it’s official. Not only is Bernard Cribbins appearing in one of the final David Tennant stories, but on-set photos also show John Simm has returned to Doctor Who! The image at right (credit for the photo goes to 
It seems that an Ood was spotted during filming of what is presumed to be the second of the 2009 Doctor Who specials, starring David Tennant as the Doctor and guest starring Lindsay Duncan as his companion.
The Doctor will face the Tritovore alongside new companion Lady Christina de Souza, who is played by Michelle Ryan of “Bionic Woman” and “Eastenders”. It has been rumored that Ryan’s character will not just appear in the special, but may become the ongoing companion in future specials or series five in 2010. 
The 8th Doctor, played by Paul McGann in the 1996 Doctor Who TV movie, will start filming one of the forthcoming feature-length specials set to broadcast next year, according to British newspaper 