Pretty Little Liars Season Season 3, Episode 10 Preview: "A"'s Back With a Vengeance Tweet August 8, 2012 by Rebecca Martin Related: Pretty Little Liars, Sneak Peeks , Aria Montgomery , Hanna Marin , Spencer Hastings , Emily Fields , Season 3 , Season 3 Episode 10 Credit: ABC Family © 2012 Disney ABC Television Group Air date: August 14, 2012. The new "A" hasn't made any overt moves recently on Pretty Little Liars, but it looks like that's going to change on Season 3, Episode 10: “What Lies Beneath.”