Jenna's (Tammin Sursok) back in Rosewood on Pretty Little Liars Season 2, Episode 23: "Eye of the Beholder." That can't be good for the Little Liars. In this gripping preview from Canada's Much Music, we learn that Jenna's returned, has had eye surgery, and is apparently as scary as ever. Will she actually be able to see? And if she can, what will she do? We're kind of frighted to find out. Check out the promo below.