Storyline: Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena makes a bold move.
Storyline: Gordon takes matters into his own hands when he travels to Miami in attempts to persuade Carmine Falcone for his help in the fight against Penguin. There, he meets Carmine's daughter, Sofia, who unexpectedly follows Gordon back to Gotham. The battle for Penguin's prized weaponry continues during auction night at the Iceberg Lounge and Bruce's presence puts him on Penguin's radar.
Storyline: Under pressure to prove that the GCPD is still powerful, Gordon attempts to bring in Jonathan Crane. However, Gordon puts himself in a dangerous situation at Arkham when he is forced to fight off lunatics and the demon within himself. Meanwhile, with Barbara's unexpected return, Selina and Tabitha must consider risks that come with joining her in the weapon business.
Storyline: Gordon fears Jonathan Crane is still alive and back in Gotham, when The Scarecrow's signature MO is used in a series of robberies. Meanwhile, Penguin's "licensing" of crime in the city backfires during the grand opening of his new Iceberg Lounge. Also, in the aftermath of his encounter with Ra's Al Ghul, Bruce begins his vigilante watch.