The Pretty Little Liars have a new lead suspect.

'Pretty Little Liars' Season 6: Liars To Solve THIS Old Murder, Marlene King Teases Major Reveal

Rosewood's new Uber Bad has Hanna (Ashley Benson), Aria (Lucy Hale), Emily (Shay Mitchell), and Spencer (Troian Bellisario) running in circles as they try to cover up five years of secrets. When episode 15 rolls around, however, the girls will have a lead suspect - Sara Harvey (Dre Davis).

"Convinced that Sara Harvey is behind the new threats, the Liars work together to get answers," Freeform said of "Do Not Disturb."

'Pretty Little Liars' Season 6: A, Big A, Uber A - Who's Who? Marlene King Teases Villain's Final Chapter

Have we been here before? I think I recognize that tree.

Sara has been caught up in the A madness before - she was Red Coat and Black Widow, after all - so it's unsurprising that Hanna and Co. would be quick to place the blame on their former dollhouse captive. Series creator Marlene King, however, was quick to remind viewers that Uber A might not be someone from the girls' past.

"Everyone is a suspect," King explained to TV Line. "[And] given the girls' history with newcomers, it's fair to say that they should be cautious."

Do you think Sara is in on Charlotte's death or the new threats? Tell us what you think in the comments below!

Pretty Little Liars airs Tuesdays at 8 p.m. ET on Freeform.