Flashback time. The girls are all trying on clothes and having a good time when Ali freaks out and heads to the window. She says that she saw the pervy Toby Cavanaugh sitting in a tree and staring at them. She thinks he saw them all naked. The girls want to tell someone, but Alison has a better idea. As fireworks go off, Alison and the girls head to Toby's house. Emily wants to leave, as she thinks this is a bad idea (and so do most of the other girls). But Alison thinks that, instead of letting the cops handle it, he really needs to be taught a lesson. They aren't even sure that it was Toby, but Alison is, and she says that it's just a stink bomb. She opens his door and throws it into his house and they all start running. There's an explosion in the garage and they all panic.
The flames fade out and in present day, Janna sits and stares at them as they all simultaneously get text messages on their phones. "If you could only see how guilty you look. - A"
Mr. Fitz is teaching and writing the words "Innocence" and "Harper Lee" on the board. They all sit down as Mona walks in and calls him Mr. Fritz before she sits down awkwardly. As he starts his discussion of innocence and its usage in To Kill a Mockingbird, Aria walks in with her transfer slip stamped "declined."
Later, Hanna studies with Sean, and it seems like he's actually paying attention to books and not her extremely short skirt. So she pours him a soda and starts kissing his neck. He says that it's too hard to stop once they start. She says they're alone, but he still puts her off. She asks him if he likes her like that, or if he thinks of her as the fat girl she used to be, and he sweetly kisses her to insist that he does actually feel for her. He's just choosing to wait, and it isn't because of his dad. I would say that it was for the best that they stopped, since Melrose Mom walks in at this point, but honestly, if she saw her daughter hooking up with a cute guy who could help her social standing, she'd probably start cheering. Melrose Mom wants Sean to let him know that they've been trying to make it to church, but she's been busy on the weekends. He jokes that his dad works weekends, too. The lame joke gets ignored as Det. Wilden walks in with Thai food, and Melrose Mom not-so-subtly tells her daughter that the preacher's son needs to get going.