Kara saves a anti-alien senator after a mysterious creature attacks, only to discover that Hank has known of the creature, who he hold responsible for killing his family and his race back on Mars, and is vowing vengeance. The deception takes on a new twist when the alien poses as the senator in order to bait Hank in a plot to kill him and Kara has to intervene before Hank goes through with his vengeance. Meanwhile, Kara helps Cat meet with her son Adam, who later asks Kara out for a date. An identical Supergirl suddenly shows up in National City, and is already the lead story on television after she tosses a dangling car off a bridge.