When Pretty Little Liars jumps forward five years, the girls reunite after the arrival of the mysterious "he." But who is this new villain and how is he connected to the liars?

While creator I. Marlene King remains tight-lipped regarding specifics, she did tell TVGuide.com that Pretty Little Liars won't drag out the major reveals. "By the end of [Season] 6B, you will pretty much know who or who's related to this big bad," King teases.

What it's like to get drunk and watch Pretty Little Liars for the first time

Learn more about Pretty Little Liars' new big bad in the video above.

Pretty Little Liars returns Tuesday, Jan. 12 at 8/7c on ABC Family, which will then be going by the name Freeform.