Image Credit: Sonja Flemming/CBSThose are some serious daggers Sheldon is shooting special guest star Mayim Bialik in this exclusive image from The Big Bang Theory‘s May 24 season finale. But there’s a thin line between loathing and lust — the only question is whether Jim Parsons’ asexual physicist will cross it. A possible clue can be found in the fine print of the ex-Blossom star’s Big Bang contract. Sources confirm that the hitcom’s producers have an option to bring her brainiac character back next fall. Of course, a romance would seem to fly in the face of exec producer Chuck Lorre’s third-gender theory. Bottom line: I have no clue where this is leading.