Captain Zenith's origin is unknown, but he was a dedicated superhero. In his only recorded case, he came to the aid of a man who had just been mugged, but couldn't find the car the victim described the criminals driving off in. Returning to ask the victim more questions, Captain Zenith saw that he was already being interviewed by the police. When the hero saw the next day's papers, his suspicions were aroused, as he saw that the victim. Mason Fleger, had his stolen property heavily insured. He confirmed his theory by listening into Fleger's conversation with his accomplice, perched outside the window of the man's flat. Confronting the two crooks, Captain Zenith easily captured them.