Well, it was fun while it lasted.
According to UK tabloid The Sun the newest incarnation of Doctor Who, which has been a hit both in the UK and here in North America, will be ending its run after the fourth series finishes up next year. The decision to end it didn't come from executives over at BBC1. Rather, it came from Executive Producer Russell T. Davies, the man who relaunched the adventures of the good Doctor back in 2006.
According to The Sun article Davies wants to concentrate on other projects. So, he's decided to end the show while it's still on top in the ratings (the show is watched by 8 million viewers in the UK each week). David Tennant, who has portrayed the Doctor since the second series, has signed on to continue playing the role through the end of the series.
Doctor Who executive producer Russell T Davies 
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