Once Upon a Time is an American fairy tale drama television series on ABC, which debuted on October 23, 2011, and concluded on May 18, 2018. The first six seasons are largely set in the fictitious seaside town of Storybrooke, Maine, with the characters of Emma Swan and Regina Mills as the leads, while the seventh and final season takes place in Seattle, Washington, in the fictitious neighborhood of Hyperion Heights, with a new main narrative led by Mills and Henry Mills, Regina Mills and Emma Swan’s son. The show borrows elements and characters from Disney and popular Western literature, folklore, and fairy tales.

The series was created by Lost and Tron: Legacy writers Edward Kitsis and Adam Horowitz. A spin-off series, Once Upon a Time in Wonderland, consisting of 13 episodes which followed the titular character from Alice in Wonderland, premiered on October 10, 2013 and concluded on April 3, 2014.