Green Arrow uses a flash arrow to blind the thieves, but their leader gets away. Artemis tries to stop her with an oil slick arrow, but it only stops her remaining two henchmen. They make it to the roof, where the woman boards a helicopter. Green Arrow shoots a tracer arrow at it, but it's discovered and deactivated. Artemis reveals her oil slick had microbeads with GPS trackers in them, allowing them to track the thief after all.
Flash called in Kid Flash to help him with escaped animals. They round up a cheetah that had been running wild in the city, and then save bystanders in the Central City Zoo from being trampled. With the people safe, they herd the animals together and create a ditch around them to contain them.
Two guards arrive to tranquilize the animals, and notify the heroes there's something wrong in the reptile center lab. They find it crawling with monkeys, but manage to store them all in a pen. They return to the lab, because Flash had noticed something missing: a sample of concentrated cobra venom. Kid Flash notices a footprint, size twenty-four at least, and discovers it contains a pollen not native to the Central City area. He suggests his mentor analyze it in his lab.
Jason Burr is working in the Gotham City Observatory when he is attacked from behind and sedated. A large man carries him out, but they are discovered by Batman and Robin. The dynamic duo try to stop them, by swinging in the orerry and crashing several of its planets on top of the criminals. Batman is knocked out when the big thug, still bearing their target, knocks a planet at him. Robin tries to attack him from behind, but the criminal lands a punch in his face.
When they begin to stir, the large thug and Dr. Burr are both gone. Batman tries to stop the other henchmen from taking a pill, but is too late. Robin stops one, and Batman immediately interrogates him.
The three heroes and their protégés convene in the basement of a Wayne Enterprises-owned hotel, the location of the local Zeta-Tube. They compare notes, and with the tracker, the analysis of the pollen and the interrogation, they've all learned the culprits are in Minneapolis. Specifically, an abandoned new age temple, purchased by Kobra recently. They discover Kobra has placed his twin brother on an altar, ready to sacrifice them in the name of their gods.
A common denominator is an attribute shared by a group of objects, or people. In this case, Kid Flash, Artemis and Robin all team up with their mentors and wind up on cases involving Kobra-related targets. Kobra and Jason Burr are twin brothers (with roughly the same name). Also, both Artemis and Kid Flash's segments end with them saying they had good teachers, referring to their mentors.
Flash says he "was CSI before anyone knew what CSI stood for", possibly referring to the CSI franchise that popularized the term. George Eads, who provides the voice for the Flash, gained his fame with the first series.
The Wayne Industries hotel is based on the DoubleTree by Hilton Hotel Bloomington – Minneapolis South, the site of CONvergence.