<P> The daughter of Snow White and Prince Charming , an ex-bail bonds collector , town sheriff of Storybrooke and Henry Mills ' biological mother . Morrison described her character at the beginning of the first season as `` broken , damaged and worldly '' . During the fourth season finale , `` Operation Mongoose '' , Emma absorbs the power of the Dark One into herself to save Storybrooke . In order to successfully create a dark version of Emma , Morrison explained that `` In order to build Dark Emma , I 've been doing a bunch of research there with some of their mythology books and old fairy tale books and just looking back through the history of swans and the etymology of ' Swan ' '' and explained that Emma 's rate of evolution `` challenged ( her ) on a daily basis '' . Emma became the primary antagonist of the fifth season 's first half , until the end of the season 's eighth episode when her real plans are revealed . </P>
<P> The daughter of Snow White and Prince Charming , an ex-bail bonds collector , town sheriff of Storybrooke and Henry Mills ' biological mother . Morrison described her character at the beginning of the first season as `` broken , damaged and worldly '' . During the fourth season finale , `` Operation Mongoose '' , Emma absorbs the power of the Dark One into herself to save Storybrooke . In order to successfully create a dark version of Emma , Morrison explained that `` In order to build Dark Emma , I 've been doing a bunch of research there with some of their mythology books and old fairy tale books and just looking back through the history of swans and the etymology of ' Swan ' '' and explained that Emma 's rate of evolution `` challenged ( her ) on a daily basis '' . Emma became the primary antagonist of the fifth season 's first half , until the end of the season 's eighth episode when her real plans are revealed . </P>
when does emma turn into the dark one
when does emma turn into the dark one
fourth season finale , `` Operation Mongoose ''
fourth season finale , `` Operation Mongoose ''