<P> The fifth season was announced on May 7, 2015, and premiered on September 27, 2015 . It was once again split into two volumes with the first volume ran from September to December 2015, and the second volume from March to May 2016 . The characters embark on a quest to Camelot to find the Sorcerer Merlin (Elliot Knight) in order to free Emma from the powers of an ancient darkness that threatens to destroy everything . To complicate matters, King Arthur (Liam Garrigan) is determined to forever alter the balance between light and darkness using the legendary Excalibur . As history and destiny collide, unsuspected consequences lead the characters to the Underworld where they encounter souls of those with unfinished business and must face Hades (Greg Germann). In an attempt to restore order to the chaos that has culminated, the characters' dangerous manipulations of magic lead to an exacerbation of the war between light and darkness, with the separation of Regina and her Evil Queen persona, as well as the arrival of Dr. Jekyll (Hank Harris) and Mr. Hyde (Sam Witwer). </P> <P> The sixth season was announced on March 3, 2016, and premiered on September 25, 2016 . The characters must defend Storybrooke from the combined threat of Mr. Hyde and an unleashed Evil Queen and the mysterious fate of saviors leads to Emma learning about Aladdin (Deniz Akdeniz). The ongoing war on light and darkness ultimately leads to the arrival of the Black Fairy (Jaime Murray) as well as the final battle that was prophesied before the casting of the original curse . </P> <P> In May 2017, the series was renewed for a seventh season consisting of 22 episodes, which marks the beginning of a soft reboot . The new setting takes place years later in the Seattle, Washington neighborhood of Hyperion Heights where Lucy (Alison Fernandez) arrives with her Once Upon a Time book to find her father Henry Mills (Andrew J. West) who is needed by his family . The inhabitants of Hyperion Heights are inhabitants of the Magical Forest who were brought there by another Dark Curse . Businesswoman Victoria Belfry (Gabrielle Anwar) plans to take over Hyperion Heights and revive her daughter Anastasia . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> <Th_colspan="4"> Nielsen ratings </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Viewers (millions) </Th> <Th> Viewers rank </Th> <Th> 18--49 rating / share </Th> <Th> 18 - 49 rank </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> October 23, 2011 (2011 - 10 - 23) </Td> <Td> May 13, 2012 (2012 - 05 - 13) </Td> <Td> 11.71 </Td> <Td> 28 </Td> <Td> 4.1 / 10 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 30, 2012 (2012 - 09 - 30) </Td> <Td> May 12, 2013 (2013 - 05 - 12) </Td> <Td> 10.24 </Td> <Td> 35 </Td> <Td> 3.6 / 9 </Td> <Td> 18 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 29, 2013 (2013 - 09 - 29) </Td> <Td> May 11, 2014 (2014 - 05 - 11) </Td> <Td> 9.38 </Td> <Td> 35 </Td> <Td> 3.3 / 8 </Td> <Td> 12 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 28, 2014 (2014 - 09 - 28) </Td> <Td> May 10, 2015 (2015 - 05 - 10) </Td> <Td> 8.98 </Td> <Td> 50 </Td> <Td> 3.2 / 7 </Td> <Td> 17 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 5 </Td> <Td_colspan="2"> 23 </Td> <Td_colspan="1"> September 27, 2015 (2015 - 09 - 27) </Td> <Td> May 15, 2016 (2016 - 05 - 15) </Td> <Td> 6.32 </Td> <Td> 69 </Td> <Td> 2.2 / 7 </Td> <Td> 34 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 6 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> September 25, 2016 (2016 - 09 - 25) </Td> <Td> May 14, 2017 (2017 - 05 - 14) </Td> <Td> 4.39 </Td> <Td> 105 </Td> <Td> 1.5 / 5 </Td> <Td> 70 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> 7 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> October 6, 2017 (2017 - 10 - 06) </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> <Td> TBA </Td> </Tr> </Table>

Where is once upon a time filmed 2017