"Beware the Green-Eyed Monster" is the eleventh episode and mid-season finale of the third season, and 55th episode overall from the Fox series Gotham. The episode was written by co-executive producer John Stephens and directed by Danny Cannon. It was first broadcast on November 28, 2016. In the episode, Gordon discovers that Mario is infected and needs to stop him before he marries Lee, but Mario is one step ahead of him and plans on making it look like he is jealous. Meanwhile, Nygma receives information about Isabella's death and despite shrugging it off, he is certain it could be true. Bruce, Selina and Alfred plan on infiltrating a Court's building, receiving a surprising help.