In the clip you will see "Brave's" Merida (Amy Manson) in action, King Arthur (Liam Garrigan) and his glorious knights, Regina (Lana Parrilla), and Emma (Jennifer Morrison) who gives a haunting statement, "The fight to control my darkness has just begun."

More twists will be happening this season like the new love of youngster Henry Mills (Jared S. Gilmore). Executive producer Edward Kitsis told Entertainment Weekly, "We're going to meet Henry's very first crush."

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Executive producer Adam Horowitz added, "It's a character that we're going to meet and we want it to be a surprise. It's fun to give Henry something new to play and deal with, and to really explore Henry as a boy who's growing up and all the joy and pain of adolescence."

TV Line revealed another surprise saying that Ruby/Red Riding Hood (Meghan Ory) will come back to this season. Ory left the show to be part of CBS' "Intelligence" but she made a guest appearance in season 3 finale.

Snow White (Ginnifer Goodwin), Prince Charming (Josh Dallas), Regina, and Hook (Colin O'Donoghue) will join forces to prevent Emma from embracing her dark side. This meant that they'll have to take a trip to Camelot and find the wizard Merlin (Elliot Knight) who allegedly can help save Emma. In the process, they will meet King Arthur of Camelot who surprisingly is expecting their visit.

Season 5 can be summed in this statement, "Not everyone can be trusted but one thing remains true - you never give up on the people you love."

When "Once Upon a Time" left off in the Season 4 finale, Henry was able to stop the Author (Patrick Fischler) from changing the ending of the fairytale characters, and became the new Author. But not everyone got the happy ending they were hoping for. When Rumplestiltskin's (Robert Carlyle) heart started to turn black, the Storybrooke residents realized that they had to do something drastic in order to prevent the darkness from wreaking havoc in the town. The darkness went to attack Regina, but Emma stepped up to stop her friend from turning evil again. The darkness consumed Emma, leaving only the Dark One's dagger in the middle of the street. But Rumplestiltskin's name was no longer etched on the blade.

"Once Upon A Time" season 5 returns on Sept. 27 at ABC.

TagsOnce Upon A Time, once upon a time season 5, Merida, Emma, ruby, King Arthur, Camelot