Jack O'Lantern, Terry Beck
Known to authorities
U.S.A. with a criminal record
Place of Birth
Moreno Valley, California
(Behind-the-scenes) Spectacular Spider-Man #243 (1997); (seen) Spider-Man: The Mysterio Manifesto #1 (2001)
Spider-Man: The Mysterio Manifesto #3 (2001)
Upon learning of Quentin's suicide, Berkhart again became Mysterio and gave his Jack O'Lantern costume to Maguire, who became the new Mad Jack in order to distinguish herself from previous Jack O’Lanterns, preferring to orchestrate her illusions from behind a computer keyboard. As the new Mysterio, Berkhart briefly joined the Sinister Seven and then unsuccessfully attempted to determine Spider-Man's true identity, but later reaffiliated himself with Maguire (although Maguire's increasing mental instability led her to believe that the new Mysterio was actually Quentin). Together, the new Mysterio and Mad Jack plotted revenge against all those who had wronged Quentin. Mad Jack abducted J. Jonah Jameson. They kidnapped Quentin's ex-girlfriend Betsy Schneider, who had made a living selling toys and children's books using Mysterio's likeness, and her husband Joe Smith. Finally, the duo incapacitated Spider-Man and Daredevil (Matthew Murdock) by dousing them in hallucinogenic "Joy Juice" which negated their super-powers. Mad Jack and Mysterio placed their prisoners in virtual reality "Happy Tanks" where they were to be kept incapacitated forever; however, the heroes escaped and defeated Mad Jack, finally learning her true identity, although not realizing the involvement of Berkhart, who had escaped.