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 Season 4 Episodes...

• s04e01 - A is for A-L-I-V-E
• s04e02 - Turn of the Shoe
• s04e03 - Cat's Cradle
• s04e04 - Face Time
• s04e05 - Gamma Zeta Die!
• s04e06 - Under the Gun
• s04e07 - Crash and Burn, Girl!
• s04e08 - The Guilty Girl's Handbook
• s04e09 - Into the Deep
• s04e10 - The Mirror Has Three Faces
• s04e11 - This Hoe is Going Down
• s04e12 - Now You See Me, Now You Don't
• s04e13 - Grave New World
• s04e14 - Who's in the Box?
• s04e15 - Love ShAck, Baby
• s04e16 - Close Encounters
• s04e17 - Bite Your Tongue
• s04e18 - Hot for Teacher
• s04e19 - Shadow Play
• s04e20 - Free Fall
• s04e21 - She's Come Undone
• s04e22 - Cover For Me
• s04e23 - Unbridled
• s04e24 - A is for Answers

Pretty Little Liars Show Summary

Never trust a pretty girl with an ugly secret. Gossip thrives amid the Mercedes-Benz, mega mansions, and perfectly manicured hedges in the exclusive town of Rosewood, Pennsylvania. Everyone has something to hide. Based off the book series of the same name, the series follows four estranged best friends Spencer, Hanna, Aria, and Emily who are reunited after their best friend and queen bee of the group, Alison, goes missing only to discover they are receiving messages from an anonymous "A" who knows all their secrets.