Som sammanfattad på Wikipedia , med ett citat från den sedan showrunner Russell T. Davies från < a href="http://web.archive.org/web/20100113182114/http://www.sfx.co.uk/page/sfx?entry=20_things_we_learnt_from"> Författarens tal: Den sista kapitlet
One of the two dissident Time Lords, described as "The Woman" in the credits, visits Wilfred on several occasions, appearing and disappearing in unexplained ways. When she lowers her arms to stare at the Tenth Doctor he appears to recognise her, but when later asked by Wilfred about her identity, the Doctor evades the question. British newspapers The Daily Telegraph and The Daily Mail identified the character as the Doctor's mother as early as April 2009. Russell T. Davies wrote in an email to the author of The Writers Tale, "I like leaving it open, because then you can imagine what you want. I think the fans will say it's Romana. Or even the Rani. Some might say that it's Susan's mother, I suppose. But of course it's meant to be the Doctor's mother."