netglen writes to mention that the fourth series of Doctor Who is a go. The BBC confirms that another season of the popular sci-fi series will be made, although the article is sketchy about the current doctor and his attachment to the next season. The third series starts at the end of this month in Britain with new companion Martha Jones, played by Freema Agyeman, replacing Billie Piper's Rose. "Tennant, who plays the time-travelling hero, would not talk to reporters about his role in future series. 'Do you know how many times I have been asked that question? Do you know how many times I have answered it?' said the actor. "