Once Upon A Time season 6
Once Upon A Time season 6 poster featuring the Evil Queen ABC

Once Upon A Time returns with season 6 on Sunday (25 September) at 8pm EST on ABC Network. Episode 1 titled The Savior, wherein Regina's alter ego and the classic villain, the Evil Queen will return.

The episode will feature the Land of Untold Stories and the debut of Oded Fehr as Jafar and Deniz Akdeniz as Aladdin. The official synopsis of the premiere episode reads as follows:

In the season premiere episode, The Savior, as our heroes set out to stop Hyde, Emma develops a mysterious side effect, and Storybrooke becomes a haven for refugees from the Land of Untold Stories. Meanwhile, Regina and Zelena embrace their newfound sisterhood by becoming roommates, while Rumple tries to free Belle from the sleeping Curse with the help of a stranger. In flashback, Jafar confronts an afflicted Aladdin in Agrabah, and a secret about the Savior is revealed.

Click here to watch the episode via live stream on ABC, or click here to watch it online on ABC's official website in the US.

Executive producer Edward Kitsis and Adam Horowitz spoke about Regina's inner demons and how the Evil Queen's return will complicate things in Storybrooke. Kitsis teased about Regina facing her toughest villain yet and told Entertainment Weekly, "We've seen a lot of growth from Regina. We've seen her fight her inner demons. We literally saw her split her inner demons. So Regina is going to face the toughest villain she's ever had to face her entire life, and that's herself."

Horowitz spoke about exploring the Evil Queen's complexity in season 6 of OUAT. He said, "Part of what she's going to be dealing with is she's been stripped away of what she thinks are her weaknesses, which is the Regina part of herself. That seems to clear her up to be unrepentantly evil and bad, which is freeing and exciting for her.

"But at the same time, she also is Regina, she also is Henry's (Jared Gilmore) mother — she loves Henry, she has that part of her as well. We're going to be exploring the complexity of what does it mean when you separate these halves, can you really separate them, can part of you actually be completely good or evil or is it more complicated?"

"And she is absolutely going to be as evil, if not more evil, than we remember," Kitsis added of the Evil Queen's return.