Terror at 20,000 Fathoms (S04E06)

The sinister Captain Nimoy concocts a scheme to unleash nuclear warheads to submerge entire continents, envisioning himself as their ruler beneath the ocean. He enlists the help of a robotic version of Batman to execute his plans. With Superman and Wonder Woman occupied on a space mission, the remaining Super Friends turn to Superman's miniature Kryptonian allies from the bottle city of Kandor for assistance in thwarting Nimoy's dangerous ambitions.