The Waters of Mars

"The Waters of Mars" is the third episode of the 2008–2010 specials of the British science fiction television series Doctor Who, which was first broadcast on BBC One on 15 November 2009. It aired on BBC America on 19 December 2009 and was released on DVD and Blu-ray in the UK on 11 January 2010 and in the US on 2 February 2010.

The story is set on Mars in the year 2059 where the Doctor encounters the first human colony, Bowie Base One. This is commanded by Captain Adelaide Brooke, who turns out to be a pivotal character in the history of humanity. The Doctor must decide whether to use his knowledge of her fate to change history. According to Doctor Who writer and producer Russell T Davies, the special is closely linked to the next two episodes but is not the first part of a three-part story.

The special was dedicated to Barry Letts, the former writer and producer of Doctor Who who died in October 2009. The episode won the 2010 Hugo Award for Best Dramatic Presentation, Short Form.