Is Ezra Fitz (Ian Harding) really "A" on Pretty Little Liars? It's the question on every fan's mind, and we're now constantly on the lookout for more evidence for or against this painful possibility. So each week, we're going to round up the most compelling clues from the latest episode to help us theorize about why Rosewood's hottest teach was in that lair.

So, read on for our biggest takeaways from Season 4, Episode 14: "Who's in the Box."

Clues Ezra IS "A"

Jekyll & Hyde. Ezra's choice of reading material is certainly worth noting. This novel is about a good man who drinks a potion that allows all of his darker impulses free rein. Is this a metaphor for Ezra's good guy/bad guy split? It certainly seems that way.

He wants to be the person Aria "thinks" he is. In their first scene together, Ezra told Aria that he would like to try to be the person she thinks he is, which implies that he's not that person now. Is that because he's actually super evil?

His conversation with Mona. Ezra's conversation with Mona didn't reveal a lot about what either party really knows about the other, but it did make it clear that Ezra knows how to lay down a veiled but effective threat, which is an essential "A" skill.

His hideaway. A secret creepy cabin with an even more secret hidden door in the floor, which "A" just happens to open in the episode tag? Yeah, that's suspicious.


Clues Ezra ISN'T "A"

Well, this could all be explained another way... Not a clue exactly, but it's worth noting that everything that Ezra did this episode could be explained as completely innocent. Jekyll & Hyde is a standard high school teaching assignment, the cabin could just be a cabin, and it's possible he thought Mona was threatening to expose his relationship with Aria, and was just trying to shut her down on that.

He gave Aria the key to the cabin. Why would he do that if it's part of his evil master plot?

It looked like "A" was wearing converses. It's a bit hard to tell because the tag was so dark, but it looked like "A" was wearing converses — which we associate with Lucas, not Ezra.

Did we miss any clues? Are you more or less convinced Ezra is evil after this episode? Sound off in the comments below!

Catch the next episode of Pretty Little Liars on Tuesday, January 14, 2014 at 8 p.m. ET/PT on ABC.

Rebecca Martin is an Associate Editor at Wetpaint Entertainment and our resident Game of Thrones, Breaking Bad, and genre TV expert. Follow her on Twitter and Google+!