Time Travel With Us: All of the Doctor’s Regenerations, Ever
It Goes Ding When There's Stuff
One of the interested con-related conversations I had this weekend was about whether the Doctor has infinite regenerations, or, as was said somewhere in canon, only twelve, and whether or not… (Spoilers)
River giving him the rest of her regenerations (nine?) might have any effect on whether there will eventually be a thirteenth Doctor.
So you know, just one of those conversations in which the conversants knowingly became parodies of themselves.