Say it ain't so! Pretty Little Liars' seasons-long mystery of who A is was finally revealed in the most recent Summer finale . . . we think. None other than Aria's great love, Ezra, is shown in A's lair looking upset in the final moments of the episode, leading us to believe that he's the mastermind who's been torturing the girls for so long. We have some time to ponder until the rest of the season returns, but until then, let's just say it again: whoa.