The Rooks - S1.E5

Gabe tells Ian about a fraternity at the school called the Rooks, who choose certain students each year to join their ranks, subjecting them to demeaning activities. Ian is the only one who makes it in. He learns that Jeremy (the Rooks leader) plans to sabotage CJ's dance, so he betrays the Rooks, only to be beaten up by Jeremy (who has a preflex ability, like Ian). However, Gabe stops the Rooks and Headmaster cancels the dance organized by CJ. Coach and Headmaster discuss Ian and the Corvus H-40 (an ability enhancing chemical taken by the Rooks) and it's revealed they were Rooks when they attended Tower Prep.