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
Superboy (comic book) Superboy (comic book) Superboy is the name of several American comic book series published by DC Comics, featuring characters of the same name. The first three titles feature the original Superboy, the legendary hero Superman as a boy. Later series feature the second Superboy, who is a partial clone of the original Superman. The first series featured the original Superboy, a teenage incarnation of the Man of Steel. It began publication in 1949, four years after the character's debut in "More Fun Comics" #101 (January 1945). The majority of the stories were set in the rural town of Smallville during