Credit: Adam Rose/ABC Television Group © 2011 Disney Photo: A Confrontation on Pretty Little Liars, June 28, 2011

Alison (Sasha Pieterse)'s creepy older brother, Jason DiLaurentis, will be back in action during Pretty Little Liars Season 2. Showrunner Marlene King told TV Guide  that "a lot of the summer season is built around what is the Jason thing, how are Jenna and Garrett involved and how does it involve the PLLs?" So, kind of like "The Jenna Thing" last season.

We've already had hints of Jason's shadiness during Season 1. In Season 1, Episode 15, “If At First You Don’t Succeed, Lie, Lie, Again,” Jason spied on the girls from Alison’s old bedroom, even though Maya (Bianca Lawson)'s family had been living there. When a fan tweeted at Marlene asking why Jason was in Maya's room, she replied: “Good question. To be answered first episode, second season.” Either he broke into Maya’s house, or he’s staying there during the investigation into Alison's murder. Sketchy.

If that isn't enough, we also have our suspicions that Jason is the new guy Aria will crush on during her break from Ezra (Ian Harding). If that's true, things will definitely get complicated. We can't wait to find out more!

Source: TV Guide