Jack O'Lantern is the name of the five supervillains who appeared in Marvel Comics. He is a member of Thunderbolts. Some incarnations were known as Mad Jack. The original Jack O'Lantern was disgraced ex-CIA Agent Jason Macendale, who assumed the identity after several years working as a freelance mercenary. Macendale was primarily a foe of Spider-Man and during his time under the alias, formed a working relationship with Hobgoblin.