<Tr> <Td_colspan="2"> List of Once Upon a Time episodes </Td> </Tr> <P> The seventh season of the American ABC fantasy - drama Once Upon a Time was ordered on May 11, 2017 . It will consist of 22 episodes, airing on Fridays, having premiered on October 6, 2017 . </P> <P> This season marks 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 will be 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 is softly rebooted with a main narrative led by an adult Henry Mills, set several years after last season's events . </P>

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