Is Ezra Fitz (Ian Harding) really "A" is the question of this Pretty Little Liars season, and we're 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 15 ("Love ShAck").

Clues Ezra IS "A"

He has a secret recording of Ali. If you were still clinging to the hope that this has all been a big misunderstanding, Ezra's clip of Ali begging someone to help her disappear should set you straight. Now it's 100 percent clear he's interested in what happened to Ali — and knows quite a lot about it.

He was really interested in what the Liars were up to. After Aria cancelled her plans with Ezra so she could go on an Ali hunting trip, he practically begged her to reveal her itinerary for the night. It seemed pretty clear that his interest was more than casual. Likewise, he was definitely a Creepy McCreeperson at school, sulking around the halls of Rosewood High and spying on the Liars as they looked at Ali's diary.

The whole breaking into Hanna's room thing. Spoiler alert: Completely innocent teachers do not go breaking into their students' rooms or messing with their computers.

It looks like he fetched the diary. Ezra went a-drivin' in the rain while decked out in "A" gear, and right after that "A" conveniently showed up at Ezra's cabin and stole the diary. The obvious conclusion is that he's the one who locked Spencer and Aria in that room.

"Hot for teacher." There's a section of Ali's diary called "Hot for Teacher," and in it she writes about a sexy teacher who interviewed for a position at the school. Could that have been Ezra? Is this a hint at how they were connected? Similarly, could the "EF + AD" we saw on the rock in the woods stand for Ezra Fitz (not Emily Field) and Alison DiLaurentis?

Clues Ezra ISN'T "A"

We didn't actually see him in the cabin. Clearly, the writers want us to still have some doubt about exactly what Ezra's role is, because they didn't definitively show him in the cabin. Could that "A" have been someone else — perhaps a partner of Ezra's? And/or the real owner of the cabin?

He was sloppy. Would the real "A" actually listen to an incriminating recording while in an unlocked room at Rosewood High? That seems to sloppy for such a mastermind... 

It's almost too obvious. One thing we've learned on Pretty Little Liars is that when the clues get too obvious, there's normally another twist on the way. With Ezra's acting like a straight up psycho, we can't help but wonder if the truth will be something a little more complicated than just "Ezra is 'A'."

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 21, 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+!