VIDEO: Sneak Peek - 'Hot for Teacher' Episode of PRETTY LITTLE LIARS

Spencer's hunch leaves her with sleepless nights and concerned friends, in "Hot For Teacher," an all-new episode of ABC Family's hit original series, "Pretty Little Liars," airing Tuesday, February 4th (8:00 – 9:00 PM ET/PT). Get a sneak peek below!

With Spencer's possible Board Shorts revelation, she is now 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 be able to figure out Spencer's secret before Spencer is ready to share?

Meanwhile, Emily looks to make amends with Alison through Shana, and all of Aria's lies start to take a toll on her.

"Pretty Little Liars" is produced by Alloy Entertainment in association with Warner Horizon Television and is executive produced by I. Marlene King, Oliver Goldstick, Leslie Morgenstein and Joseph Dougherty. The series stars Troian Bellisario, Ashley Benson, Lucy Hale, Ian Harding, Laura Leighton, Shay Mitchell, Janel Parrish and Sasha Pieterse.

Part of the Disney/ABC Television Group, ABC Family is distributed in over 97 million homes. ABC Family features programming reflecting today's families, entertaining and connecting with adults through relatable programming about today's relationships - told with a mix of diversity, passion, humor and heart. ABC Family's programming is a combination of network-defining original series and original movies, quality acquired series and blockbuster theatricals.

For 2014, ABC Family has launched the "WATCH ABC Family" authenticated service which allows viewers with participating TV subscription services access to 24/7 live viewing of the network, as well as continued on demand access to such popular series at home and on the go via a wide array of devices. ABC Family is also the destination for annual Holiday events with "13 Nights of Halloween" and "25 Days of Christmas." ABC Family. A New Kind of Family.