Paradigm Shift: Paradigm Slippage: Paradigm Boogie-Woogie (Retcon, #11)

It's the same old story: Girl Meets Boy, Girl Looses Boy, Girl travels through time and meets herself, and Boy again, only it's not quite the same Boy, and… er, try again: It's the same old story: You're trying to change the world, but it's trying to change you, too, and it wins, and it's you that's changed and not the world, only you're part of the world so it's different, too, and watch the sexes of the Professor and Doctor because something fishy is going on there… er, take three: It's a...