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.
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.