After hearing of the Justice League's rampage on Rimbor, the Kroloteans decided to investigate Earth. They landed a ship under a junkyard in New Orleans,[4] only accessible by Zeta-Beam or under the waterline. From there, they coordinated smaller bases all across the planet.
They abducted several people and used special mechanical suits to impersonate them; Tseng, Noor Harjavti and Bibbo Bibbowski were imprisoned on a lower deck.[5]
After the base's Zeta-Beam was detected, Robin, Blue Beetle and Lagoon Boy were sent to investigate. They freed the hostages and apprehended one Krolotean, but the others got away and destroyed their base.[5]