"Pretty Little Liars" fans are dying of spoilers after the crazy Halloween special, and now with a new promo and an interview with executive producer Joseph Daugherty, we have some hints at the winter premiere, "Who's in the Box?"

Firstly, a promo for the season 4 winter premiere has aired following the Halloween special "Grave New World," so check it out below:

The winter premiere will take place January 7, 2014, and executive producer Joseph Daugherty says the revelation of Allison being alive will change everything.

"Each one of the four has a different [reaction]. I think they're all separately torn and that's one of the things that drive the second half of season four -- how they deal with this reality and what it means for them personally," says the "Pretty Little Liars" executive producer to Hollywood Reporter.

"I think they're very smart, and I think that as they try to solve the new mystery of Ali being alive, they're going to be stumbling. They're going to be finding out some very difficult things about some characters that will be hard for them to reconcile unless they admit that there's a possibility that this is the truth."

With that in mind, here are some confirmed spoilers for the "Pretty Little Liars" season 4 winter premiere.

--The question of who's in the box, meaning Allison's coffin, will be addressed.
--Caleb will appear in this episode.
--Mona will appear in the episode, and will share a scene with Hanna.
--The tweet "There's a B in the box" has been tweeted by several "Pretty Little Liars" contributors.

So with these spoilers in mind, be sure to check out the "Pretty Little Liars" season 4 winter premiere this January!