he third season of the American ABC fantasy-drama Once Upon a Time was announced on May 10, 2013. The premiered on September 29, 2013, with the plot revolving around the main characters travelling to Neverland from Storybrooke to retrieve Henry Mills. The series will feature crossover episodes connecting with the spin-off Once Upon a Time in Wonderland. The season will be split into two parts, with the first eleven episodes airing in Autumn 2013 and the latter half returning in Spring 2014. New characters appearing this season include Ariel, Prince Eric, Tinker Bell, and Peter Pan.

Overview from themoviedb.org