Maybe it's Melissa that is the Jekyll & Hyde and Spencer's dream was trying to warn her that Melissa has two personalities and one of them is a killer of little girls. Like maybe she honestly doesn't remember that part of their childhood. Or any parts of their childhood. Or maybe the Jekyll of her took over back then with the jump rope and also took over again, with Alison, and that's why Ian said all that confusing stuff last year. When you think about how easy it would be for Spencer to turn into a serial murderer Melissa starts looking even more suspicious.

Or maybe Melissa totally does remember that whole deal, and just doesn't feel like admitting it because Spencer gets on her nerves.

FITZ

Aria: "It's just so high school that the blind girl we blew up that time is now taking my Pottery class. What a bitch!"
Ezra, having recently showered: "Aria, you're still in high school. Don't take that away from me. Just make friends with her. You're both smart, pretty, wildly pretentious..."
Aria: "Ezra. We blew her up."
Ezra: "Work it out with Jenna. That's the grownup thing to do."
Aria: "Then I will most certainly be doing the opposite."

Aria immediately locates some quieter shoes and puts away all her stupid dangly jewelry the better to lurk around Pottery not speaking and spy on poor fuckin' Jenna all the time.

HASTINGS

Spencer finds the wedding ring hidden behind the toaster, and the music shits itself.

I honestly don't know what that's about. Is she going to keep hiding it so that Melissa will be her pregnant human shield? Is she going to save the day by finding it? Is she going to hold it ransom until she can get Melissa to agree that her husband is a pedophile?

So many crazy things for crazy Spencer to be thinking!

MARIN

Dad: "No, I'm not attempting to become a bigamist! Don't be ridiculous, honey! You know I hate my old family and want nothing more than a handjob from my ex-wife! Listen. My daughter just walked in, I'll call you back."
Hanna: "Shit, does this mean we're alone? No thanks."
Dad: "I'm just fighting with your new stepmom about our wedding."
Hanna: "Mom is going to be on you like white on rice if she finds this out."
Dad: "Oh, trust me. She's got my number."