When Clark Kent drinks Prof. Vance's life-extending vitamin serum, which contains particles of Kryptonite, it ages him to about 70 years old. Since his robots won't respond to his aged voice, Superman must fulfill his duties as the Old Man of the Sea, Santa Claus, and Father Time so that no one realizes that Clark Kent is Superman.; Tommy and the Planeteers battle a giant space amoeba.; Murderer Corliss Hyde hijacks a passenger plane, which crashes into the jungle. Congo Bill, as Congorilla, saves the crew, but not before Hyde realizes that there's an intelligent mind directing the gorilla. Using gas grenades, he puts Congorilla to sleep, and fits him with an explosive collar, forcing him to commit crimes.