Once Upon a Time Season 5 Promo “No One Can Stay Good Forever”

She was a hero, a savior. But no one can stay good forever. Watch out for The Dark Swan when Once Upon a Time Season 5 premieres Sunday September 27th on ABC! Official website: http://abc.go.com/shows/once-upon-a-time/ Official Facebook Page: https://www.facebook.com/OnceABC/ Official Twitter Page: https://twitter.com/OnceABC/