Re: regenerations used up (Score 2, Informative)

I think the Doctor has already exceeded his original number of regenerations.

See http://www.bbc.co.uk/cult/doctorwho/episodeguide/b rainmorbius/ . In the Time Lord Mind Game the Doctor and Morbius battle and Morbius asks the Doctor how long he has lived. We see the faces of the incarnations of the Doctor we know and then other faces we don't know, totaling 12. This implies that Tom Baker's Doctor is the 12th regeneration.

Then see http://www.bbc.co.uk/cult/doctorwho/episodeguide/l ogopolis/. I think the Watcher reset the clock on the Doctor's regenerations. Either from the point when the Doctor left Gallifrey or to one.