Once an Evil Queen, always an Evil Queen?

Last season on Once Upon a Time, Regina (Lana Parrilla) evolved from the icy, "my way or the highway" queen she had been to one of the good guys. Her true love broke Henry's amnesia spell, and she even teamed up with her nemeses Snow White (Ginnifer Goodwin) and Emma (Jennifer Morrison) to bring down the Wicked Witch.

[Photos: Red Carpet Pics From the 'Once Upon a Time' Season 4 Premiere]

But when Season 4 premieres this week, that good girl act may swiftly come to an end. If you recall, in the finale, Regina's heart was broken when her new love, Robin Hood, was reunited with his supposedly dead wife. And when Regina's heart is broken... well, she tends to lash out.

In the exclusive sneak peek above (which first debuted for fans at Comic-Con back in July), Regina calls on an old friend to help with her dilemma — Sidney Glass, aka the Magic Mirror (Giancarlo Esposito)!

ONCE UPON A TIME - A Tale of Two Sisters - A scared and confused Elsa finds herself in Storybrooke and, fearful of the intentions of its residents, creates a powerful snow monster for protection. With Robin Hood's wife, Marian, back in the picture, Regina wonders if her happily ever after with the former thief has been completely quashed; while on their honeymoon, Mr. Gold finds an intriguing object that makes him question whether or not he should officially give Belle control over the dagger that makes him The Dark One, and Hook is dismayed to discover that Emma seems to be avoiding him while she tries to help comfort Regina after being the one responsible for bringing Marian back from the past and into Storybrooke. Meanwhile, in Arendelle of the past, as Elsa's sister Anna's wedding to Kristoff nears, Anna discovers that their parents - who died on-ship during a violent storm - were heading to a mysterious destination in a quest that may have held the secret to containing Elsa's out of control Ice powers. And against Elsa's wishes, Anna wants to finish their journey to find out what they were looking for, on Once Upon a Time, SUNDAY, SEPTEMBER 28 (8:00-9:00 p.m., ET) on the ABC Television Network. (ABC/Katie Yu) GIANCARLO ESPOSITO More

"I need my Mirror," she says.

And though he's been locked up thanks to her, how else would the loyal Mirror reply?

Once Upon a Time Season 4 premieres Sunday at 8 p.m. on ABC.