By Lynn Tackitt

ABC Family’s Pretty Little Liars, based on the popular books by Sara Shepard, is a guilty pleasure for a lot of women who tune in week after week. They tune in to see who is tormenting the four friends who all hold one big secret and a whole bunch of their own. Who is the mysterious person who seems to know all their secrets, knows what they are doing all the time, and leaves them notes and texts with just a signature of “A?”

As the weeks have unfolded this season, the girls have gotten closer and closer to the one and only “A.”

We met up with Janel Parrish, who plays Mona, as she discusses this season's twists and turns and reveals some of the plot line of who “A” really is. It might just leave you with a shock that you never saw coming.

By Lynn Tackitt

When you were in school, odds are you didn't have someone giving you a hard time or someone harassing you about the secrets you held or the mysterious death of a friend. Pretty Little Liars is a show filled with plot twists and turns and questions that keep their viewers returning week after week to see what is unfolding next.

Another nice thing to keep the viewers coming back could be bad boy boyfriend of Hannah, played by Tyler Blackburn. Tyler talked with us about some of the possible plot lines, without giving too much away, what it's like on the set, and what is going to happen this season on Pretty Little Liars, which is on ABC Family on Mondays.