Superboy (Bob Hastings) must thwart a deranged scientist (is there any other kind?) who unleashes "The Revolt of Robotville". This is one of those deals where Lana Lang (Janet Waldo) is growing suspicious of boyfriend Clark Kent also being the Teen of Steel, but Superboy thwarts that, too.
The professor's true motives were never explained. It was assumed the robots had gone amok, Superboy thwarts the first attempt, but the professor, jealous, moves forward with an incomprehensibly mad plan. In 1966, they didn't expect anyone to read between the lines, but, nearly 50 years later, we can.