Captain Marvel (DC Comics) in unison, they can become adult superheroes as well. In "Whiz Comics" #25 (Dec 1941), Captain Marvel saves Freddy Freeman, a boy who had been left for dead by the evil Captain Nazi, and does for Freddy what the wizard did for him. By speaking the name "Captain Marvel," Freddy can become the superpowered Captain Marvel, Jr.. Unlike Billy, Freddy retains his 14-year-old appearance as a superhero. "Captain Marvel Adventures" #18 (Dec. 1942) introduced Billy and Freddy to Mary Bromfield, a rich girl who turns out to be Billy's long-lost twin sister. By saying the magic word "Shazam," Mary Bromfield
Adventures of Captain Marvel this as one of the most outstanding of all serials and Republic's "masterpiece". He writes that Tyler's "striking performance...remains in thousands of minds as the most memorable serial hero of all time – bar none". The characters of Betty Wallace, Whitey Murphy, and John Malcolm all appeared in the Fawcett comics in the 1940s, beginning with "Capt. Marvel And The Temple Of Itzalotahui" ("Whiz Comics" #22, Oct. 3, 1941) featuring Murphy and Malcolm; Murphy made several appearances in the 1970s DC Comics incarnation of Captain Marvel, as featured in the comic series "Shazam!" and "World's Finest Comics". Fawcett also published