Credit: ABC Family

Is Ezra Fitz leaving Rosewood High? A new Pretty Little Liars casting call for a hot new substitute teacher in her 40s seems to suggest so.

When Pretty Little Liars returns in the winter to finish up Season 4, there will be a new face at Rosewood High. E! Online reports that PLL is currently casting a pretty new sub, which could mean Ezra is on his way out. The episode title, “She’s Come Undone,” could also be referencing Aria, who will most certainly come undone if Ezra is fired — or when she finds out he is “A.” Perhaps Ezra leaves Rosewood entirely. Then Aria would really lose it!

Yikes. It sounds like the second part of Season 4 is going to be an emotional rollercoaster for our Liars. Not only will the be on the hunt to find Ali, who they now believe is alive, but the clues they found in “A”’s lair may also come in handy when they start investigating into Ali’s disappearance.

Plus, as always, relationships will be tested as Caleb moves to Ravenswood, Emily and Paige figure out their future, Spencer tries to win back Toby’s trust, and Aria struggles with her feelings for Ezra, who very well could be “A.”

What do you think, Pretty Little Liars fans? Do you think this episode sounds like Aria? Is Ezra going to be fired? Sound off in the comments!

Catch the Pretty Little Liars Season 4 Halloween special on Tuesday, October 22, 2013 at 8 p.m. ET/PT on ABC Family.

Crystal Bell is an editor at Wetpaint Entertainment and our resident fan-girl for all things Pretty Little Liars, The Vampire Diaries, Game of Thrones and Once Upon a Time. She speaks fluent geek. Follow her on Twitter and Google+!