User:SOTO/Forum Archive/The Panopticon/@comment-3999524-20141211184047/@comment-188432-20141212031054
From Tardis Wiki, the free Doctor Who reference
It's not Susan thinking that there's no way for him to regenerate. It's the omniscient narrator saying that, flatly. Besides, he doesn't regenerate. That's the point. At no point in the book does it suggest that he in anyway regenerated when he went from being Delgado to being Pratt. They are very much the same incarnation of the Master at different points on his quite singular timeline.