Troian Bellisario: Sleep Deprived on 'Pretty Little Liars' Tonight

Troian Bellisario makes a suspicious transaction in the school hallway in this new still from Pretty Little Liars.

In “Hot For Teacher”, With Spencer’s (Bellisario) possible Board Shorts revelation, she is more determined than ever to prove her theory before bringing it to the other girls attention especially since it could have a devastating effect on one of the Liars.

But with many sleepless nights fueled by prescription medication, Hanna starts to notice Spencer’s odd behavior. Will Detective Hanna (Ashley Benson) be able to figure out Spencer’s secret before Spencer is ready to share?

Meanwhile, Emily (Shay Mitchell) looks to make amends with Alison (Sasha Pieterse) through Shana, and all of Aria’s (Lucy Hale) lies start to take a toll on her.

“Hot For Teacher” airs TONIGHT, February 4th @8PM ET/PT on ABC Family. 10+ pics inside…