In Metropolis, Superman has an encounter with a stories-tall robot controlled by Lex Luthor. After a short battle, Lex, in his robot steals a small programming circuit from S.T.A.R. Laboratories and then escapes. After thinking about his fight with Lex, Superman traces the path of the robot to the Metropolis Bay. After locating and entering Lex's underwater lab, Superman and Lex battle again. While Superman is disabled by a red sun-based laser blast to his eyes, Lex places the stolen programming circuit in a tube which is then transported to a hidden location. After he recovers, Superman captures Lex Luthor and has him imprisoned.