Pretty Little Liars

Pretty Little Liars Season 4 Halloween Episode: Behind the Scenes of “Grave New World”

Every year, ;Pretty Little Liars ;scares the living heck out of us. And this year, they're taking it a step further — into the land of the dead. ;As you've heard, Season 4: Episode 13 ;takes place in a graveyard at Ravenswood's Founders Day Celebration.

While you've likely started to form some conclusions about what will happen based on the official photos, a few behind the scenes pics have us scratching our head and wondering what's up when they go down — underground?

Click through to see some pretty creepy shots of a truly terrifying episode to come, and give us your thoughts on what these photos mean. But don't leave early and miss the surprise ending! ;