No idea. Something to do with the Black Swan, maybe? It's A-Team work, that's for sure, but I couldn't tell ya more than that. Jenna slinks around the dance her own crazy self, and nobody's the wiser even though she stands around chattin' up Lucas and looking at things with her eyes, but I think this is about the Black Swan, and we don't find out who that is -- although I'm glad it's happening, because Swan Lake makes even more sense as a PLL reference than it did with Gossip Girl, where it was awesome.

MASQUERADE

Liars: "Ironically, we're trying to track down somebody at a dance where we can't tell who anybody is. Hey, where's Melissa? At home? Cool. Now, it would be dangerous for us to split up, and A told us not to split up, and none of us have dates so there's no reason we would split up anyway, because that would be awkward, so I guess the first thing we should do is ... split up."

They split up.

Caleb immediately appears to Hanna! Even though he was supposed to be hanging out with his mom, who flew into town today -- Therapy Anne? -- Mona got him to Brookhaven and picked out his costume and presented Caleb to Hanna as a gift. Like a pigeon she tore the head off of. As is their wont, Hanna and Mona immediately make Caleb's presence more about them than noticing him standing there.

Hanna: "Sorry we all lied to you and totally burned you yesterday, but I mean, we always do that."
Mona: "No problem, because I have a feeling you won't be keeping any secrets from me ever again."
Hanna: "What?"
Mona: "I said, Something stupid about Caleb being a hot toddy!"
Hanna: "Oh, okay. I love you!"
Mona: "I love you too! In a scary way!"

Oh man, I just remembered this one time where I talked about how Mona loves Hanna so much she wants to scoop out Hanna's insides and wear her like a sweater and pilot her around town like a giant robot! How could I know that?

STATE OF ADRENALINE HYPERREALITY IS HOW

Spencer: "I have to admit, you had me fooled, but I've got you figured out."
Mona: "Oh shit, you know I'm A?"
Spencer: "What? No, just that you're pretending to be a superficial bitch but you're actually a really good friend. Rewind to what you just said?"
Mona: "Nope. But thanks for saying that. When my blood reign begins, you may not be the first to fall."
Spencer: "You're being so random tonight! Anyway, sorry I stood idly by and let Alison torture you for so many years. She kind of worked our insecurities."
Mona: "Don't be silly! I haven't thought about that bitch since I murdered her and started stalking you. Although it's weird that you mention her, because I have a flashback to tell you about Alison that is maybe a lie or maybe it is the truth."