Watch Pretty Little Liars Season 2 Episode 15 online

Here's what next after the Rosewood girls got "A"'s number. The PLLs realize that "A" is not acting alone and his/her "helper" may be closer than they think. After their recent encounter with "A", Aria, Emily, Hanna and Spencer think they may be closer than ever to figuring out whom "A" really is. But when the girls decide to enlist Caleb's hacking skills to help with their quest, Hanna no longer wants a part of the plan. The last thing Hanna wants is to get Caleb involved in something else shady and also to open the door to questions that Hanna can't answer. Once the girls realize that "A" has a helper, Hanna has no other choice. Instead of focusing on figuring out who the "helper" is, Hanna decides to put all of her efforts into throwing a surprise party for Caleb. But will a surprise party at Spencer's lake house be the diversion Hanna is looking for, or just a recipe for disaster?

•  Season 2, Episode 13 : The First Secret10/19/2011  
•  Season 2, Episode 14 : Through Many Dangers, Toils, and Snares01/02/2012  
•  Season 2, Episode 15 : A Hot Piece of 'A'01/09/2012  
•  Season 2, Episode 16 : Let The Water Hold Me Down01/16/2012  
•  Season 2, Episode 17 : Blond Leading the Blind01/23/2012