Captain Marvel (DC Comics) Comics" #21 (1941) introduced the Lieutenant Marvels: three other boys named "Billy Batson" who could also become adult superheroes. Captain Marvel, Jr., the alter-ego of disabled newsboy Freddy Freeman, debuted in "Whiz Comics" #25 (1941). Mary Marvel, alter-ego of Billy's twin sister Mary Batson, first appeared in "Captain Marvel Adventures" #18 (1942). In contrast to Captain Marvel and the Lieutenants, both Mary Marvel and Captain Marvel, Jr. remained kids in superhero form, and were given their own eponymous books in addition to appearing as the lead features in "Master Comics" and "Wow Comics", respectively. Captain Marvel, Captain Marvel Jr., and
Iron Man (comic book) Iron Man (comic book) Iron Man is the name of several comic book titles featuring the character Iron Man and published by Marvel Comics, beginning with the original "Iron Man" comic book series which debuted in 1968. The character made his first appearance in "Tales of Suspense" #39 (cover dated March 1963). After issue #99 (March 1968), the "Tales of Suspense" series was renamed "Captain America". An Iron Man story appeared in the one-shot comic "Iron Man and Sub-Mariner" (April 1968), before the "Golden Avenger" made his solo debut with "Iron Man" #1 (May 1968). The series' indicia gives its