Once Upon a Time season 3

The third season of the American ABC fantasy-drama series Once Upon a Time was announced on May 10, 2013. It was split into two volumes, with the first airing from September 29 to December 15, 2013, and the second from March 9 to May 11, 2014. Ginnifer Goodwin, Jennifer Morrison, Lana Parrilla, Josh Dallas, Emilie de Ravin, Colin O'Donoghue, Jared S. Gilmore, and Robert Carlyle return as principal cast members from the previous season, and are joined by Michael Raymond-James in his only season as a regular.

The first volume's plot revolved around the main characters traveling to Neverland from Storybrooke to retrieve a kidnapped Henry Mills (Gilmore) from the possession of an evil Peter Pan. After successfully retrieving Henry, the characters returned to Storybrooke, only to be returned to their original worlds following Pan's attempt to cast a new curse, leaving Emma Swan (Morrison) and Henry to escape to New York City after Rumplestiltskin (Carlyle) killed himself and Pan who was revealed to be his father. The second volume's plot followed the characters' past journey in the Enchanted Forest and how they were brought back to Storybrooke by Zelena, the Wicked Witch of the West and Regina's half-sister, while also documenting Emma's mission to break the new curse and save her family.

Existing fictional characters introduced to the series during the season include the main antagonists of the two volumes, Peter Pan and the Wicked Witch of the West, alongside Tinker Bell, Ariel, Prince Eric, Ursula, Medusa, Rapunzel, Lumiere, the Wizard of Oz, Glinda the Good Witch, the Good Witch of the North, the Witch of the East, Dorothy Gale, Blackbeard and Elsa.