Over the years, Johnson fought supervillains such as Steeljack, organized crime figures like the Underlord, and common criminals. Meanwhile, in civilian life, he established his own independent toy company, married and had a son, Zachary Johnson. For several years, he balanced his responsibilities to his family, career and heroic mission successfully, keeping his son and possibly even his wife ignorant of his secret identity. But his luck ran out in 1983, during a conflict with the villainous Underlord. He ended his career as he began it, rescuing innocents held hostage by criminals, knowingly entering a trap set by his enemy to do so. Caught in an explosion, his fate was a mystery, with the authorities and media speculating both that he might have been killed and that he might have escaped. As time passed and Jack-in-the-Box did not reappear, hope for his survival dimmed, though it was thought that he had at least taken his enemy down with him.