<P> The seventh season of the American ABC fantasy - drama Once Upon a Time was ordered on May 11, 2017 . It consisted of 22 episodes, airing on Fridays, having premiered on October 6, 2017 . </P> <P> This season marked a significant change for the series, as it was announced at the end of the sixth season that the majority of the main cast members would not be returning for season 7 . Lana Parrilla, Colin O'Donoghue, and Robert Carlyle were the only ones remaining . Andrew J. West and Alison Fernandez were announced as new regulars in May 2017 . Dania Ramirez and Gabrielle Anwar were announced as additional regulars in July 2017 . In August 2017, it was announced that Mekia Cox had been promoted to series regular after initially joining the cast in July as recurring . </P> <P> The storyline was softly rebooted with a main narrative led by an adult Henry Mills, set several years after last season's events . In February 2018, it was announced the seventh season would serve as the final season of the series; the season and series concluded on May 18, 2018 . </P> <P> Several years after the Final Battle, Henry Mills leaves Storybrooke in search of his own story, only to find himself in the New Enchanted Forest of New Fairy Tale Land, where a conflict between Lady Tremaine, Cinderella, Drizella, a resistance led by Tiana, and Mother Gothel's Coven of the Eight culminates in the casting of a new curse that sends the New Enchanted Forest inhabitants to Seattle in the past, before Henry leaves Storybrooke . As Henry's daughter Lucy sets out to restore his belief, Gothel's coven builds its sinister agenda and contends with an unknown witch murderer, while Dr. Facilier embarks on his own power grab for the Dark One Dagger . However, the breaking of the curse results in the return of Rumplestiltskin of the Wish Realm who intends to doom everyone to a miserable end, and amplify his own powers . His defeat ultimately leads to Regina's decision to merge all the realms of story, uniting them into one: the United Realms, with Regina elected and crowned the Good Queen . </P>

When does the final episode of once upon a time air