User:SOTO/Forum Archive/The Panopticon/@comment-43908-20150311013943/@comment-27280472-20160601152223
From Tardis Wiki, the free Doctor Who reference
AdricLovesNyssa wrote: The books' third incarnation could be explained away as happening via a different type of regeneration
No "explaining away" is necessary. There's no guarantee that she'd regenerate into the same incarnation in the first place, or even that The Shadows of Avalon comes after Enemy Lines instead of before.