Suspect #3: Mona Vanderwall

Credit: Craig Sjodin/ABC Family Channel © 2010 Disney ABC Television Group Photo: Mona on Pretty Little Liars, June 21, 2011

Why she might be “A”: Mona Vanderwall (Janel Parrish) seems to know about Aria and Ezra’s relationship, since she asks Aria to pick out a gift for Ezra. And speaking of that gift, is To Kill a Mockingbird seriously the best gift Aria could think of? Doesn’t he probably own a million copies of that book, and is probably totally sick of teaching it by now?

Why she might not be “A”: Mona and Hanna reconciled, making Mona actually seem nice! Frankly, we were shocked (even though it mainly made us wonder what she was up to). Let’s face it: Mona acting nice is like a pizza not being delicious — it just doesn’t happen.

We know that you’re dying to know who “A” might be! Don’t worry — we’ve got our crack team of sleuths on the case, picking up even the tiniest clue for your mystery-solving pleasure. Here are some hints from Pretty Little Liars Season 2, Episode 2: “The Goodbye Look,” that may help us solve this thing for good!

Suspect #1: Melissa Hastings

Why she might be “A”: Melissa (Torrey DeVitto) clearly snuck out of the house without telling Spencer (Troian Bellisario), since her jacket and boots were wet, and we’re guessing that she went to see Ian. All we know for sure is that Melissa doesn’t seem like the type to run outside on a stormy day just to belt out “Singin’ in the Rain.”

Why she might not be “A”: Yes, she’s sneaky. But her only real fault so far is that she’s bringing a child into an extremely unstable environment. Come to think of it, Melissa and Ian might actually make for worse parents than Britney Spears and Kevin Federline, and that’s no small feat.

Suspect #2: Jason Dilaurentis

Credit: Adam Rose/ABC Television Group © 2011 Disney Photo: Drew Van Acker Working Hard on Pretty Little Liars, June 28, 2011

Why he might be “A”: This dude was uber-creepy this week while building a fence, snarling at Spencer, and throwing away a bunch of old Ali mementos. In fact, that was a ton of trash that he put at the curb, and some of it even seemed like stuff that could be reusable. Al Gore would not be pleased.

Why he might not be “A”: We can understand that the mystery surrounding his sister’s death would make him upset. But if you ask us, the bigger mystery is what happened to the actor who played Jason last season! If we were that actor, we’d be a little bitter about getting the axe after only one season, especially when it took eight seasons for Charlie Sheen’s drug-and-prostitute binges to get him fired from Two and a Half Men! What gives?