Donna has a photographic memory now. Something to do with the 'accident', her doctors say.
She sees entire books in her head, math equations that don't make sense to her scrolling through her mind. And for some reason, she magically knows the recipe for banana daiquiris, even though she hates bananas.
She remembers everything, she's brilliant after all, so why can't she remember a whole year of her life?
Spiders and wasps and fire and ice and rage and it's wonderful but it's terrible....
“And then you forgot.”
And Donna goes back to her wonderful, far from terrible life. Some things are better left forgotten.