When will Doctor Who finish?

Fourth Answer (July 2013)

Doctor Who is an ongoing television series. it is not a mini-series, nor is it bound by a finite storyline. Therefore there is no end date for the series at the present time. It will end as most series do, when ratings drop sufficiently and the BBC sees no further financial incentive to continue producing the program. This could happen in 2014, or it could happen a decade from now. The so-called "13-life limit" will not apply as the series has introduced workarounds dating back to 1983 and the current and previous producer have already stated it will be ignored or hand-waved away. The 1983 storyline The Five Doctors revealed the limit is artificial and imposed by the High Council of the Time Lords; the revival series has established that the High Council no longer exists in the current continuity.

Third Answer (March 2012)

In the 'Death of The Doctor' episode of the Sarah Jane Adventures (a spin-off show from Doctor Who), the Doctor says he can regenerate 507 times.

That being said, the Time Lord's lives were limited because of the "Time Lord Social Order". However, the Time Lord Social Order was wiped out when the Doctor's home planet was destroyed. Which would possibly make it possible to have more than 13 regenerations.

Second Answer (August 2010) As the other person said, there will obviously be more. Doctor Who is too popular at the moment.

First Answer (January 2010)

No one knows but the Doctor is meant to have 13 incarnations, he's on his 11th but Russell T Davies said "There will be more incarnations!".