Sasha Pieterse

It's homecoming dance night on 'Pretty Little Liars' (Tue., 8PM ET on ABC Family). In high school, dances usually lead to drama no matter what. But given the nature of this show, you should expect extra-high levels of weirdness and backstabbing.

[Spoiler alert.]

Emily (Shay Mitchell) brings somewhat creepy guy Toby to homecoming. But then, while they're at the dance, Emily's friends learn some unexpected revelations about Toby (Keegan Allen) -- and these revelations lead them to believe that he is the person who murdered their friend Alison (Sasha Pieterse).

Then, blackmail and accusations of step-brother/step-sister sex are thrown into the mix. All of which basically gives us the perfect 'Pretty Little Liars' dance night.

At the end of the episode, Emily runs from suspected killer Toby in terror. While fleeing, she stumbles -- and falls. Then the screen fades to black.