In what episode does Henry Mills' biological mother help two children track down their father before they are placed in a foster care system?
True North (Once Upon a Time): "True North" is the ninth episode of the first season of the American fairy tale/drama television series "Once Upon a Time". True North (Once Upon a Time):  In the episode, Sheriff Emma Swan (Jennifer Morrison) helps two children (Karley Scott Collins and Quinn Lord) track down their father before they are placed in a foster care system, in a parallel with the story of Hansel and Gretel. Emma Swan: The daughter of Snow White and Prince Charming, an ex-bail bonds collector, and Henry Mills' biological mother.
ninth episode