Brace yourselves, “Pretty Little Liars” fans. The Season 5 drama continues Tuesday night with episode 15, and according to executive producer Marlene King, things are going to get “gnarly.”

“Hanna sees something really gnarly tonight on PLL,” King tweeted. “What do you think it could be? #PrettyLittleLiarsDay.”

Since Mona’s (Janel Parrish) body still hasn’t been found, our bet is that Hanna (Ashley Benson) will stumble across her ex-best friend. However Hanna’s mom, Ashley (Laura Leighton), could also potentially tie into the “gnarly” moment in question. Promo photos from the upcoming episode show Ashley interacting with Jason DiLaurentis (Drew Van Acker). While it appears to be strictly business, our fingers crossed it doesn’t turn into something a little more racy.

As we previously reported, things will not get easier for Hanna, Aria (Lucy Hale), Emily (Shay Mitchell) and Spencer (Troian Bellisario) now that Alison (Sasha Pieterse) is behind bars. Toby (Keegan Allen) will stumble across a new piece of evidence, which will “put him in a difficult position” with the police and Spencer. Based on the promo video for episode 15, it sounds like that new piece of evidence is a bloody knife found on Mona’s property.

“That knife could be the murder weapon,” Toby says in the promo. “It’s what we’ve been looking for. It’s what we need.”

However the others don’t seem to agree with Toby. Although he’s now part of the Rosewood Police Department, Caleb warns Spencer that as long as the knife exists, “’A’s’ going to find a way to get it back.”

Catch Season 5, episode 15 of “Pretty Little Liars” on ABC Family Tuesday, Jan. 13, at 8 p.m. EST. Watch a sneak peek video below:

RELATED STORIES