One of the executive producers of Once Upon a Time teased fans with a detail from season 3 recently.

Executive producer Edward Kitsis told Entertainment Weekly on Friday that there will be something surprising, regarding the Magic Mirror (Giancarlo Esposito) in season 3.

"I think you're going to see a moment that you didn't realize you never saw but then realize you really wanted to see," Kitsis revealed. "It's one of those low-hanging fruits where we realized, 'Wait, we didn't see this?! Oh my God!'"

The Magic Mirror's Storybrooke counterpart, journalist Sidney Glass, was locked away in an asylum by Regina (Lana Parrilla) in the season 1 finale. Until it was announced that Esposito was returning for season 3 from his incarceration, it was unknown whether Glass or Esposito would be featured in the series ever again. And it is still unclear whether Kitsis' comments are referring to the Magic Mirror or Sidney Glass.

Once Upon a Time Season 3 Spoilers: Video Preview Featuring Rumplestiltskin vs. Lost Boy

In other Once Upon a Time news, the complete second season was released on DVD this week with a multitude of bonus features. One of those features is a deleted scene from season 2, featuring Hook's (Colin O'Donoghue) confrontation with two Storybrooke strangers.

In the scene, Hook discussed the deal he had with the "strangers" to kill Mr. Gold/Rumplestiltskin (Robert Carlyle). Rumple chopped off Hook's left hand, and Hook has been seeking revenge ever since.

Watch the deleted scene here:

The season 3 premiere of Once Upon a Time, titled The Heart of the Truest Believer, will air Sunday, Sept. 29 at 8 p.m. on ABC.

Tags: Once Upon A Time Once Upon A Time Season 3 Spoilers