| Issue | #21 |
| Published | March 1948 |
| Cover Price | 0.10 USD |
| Pages | 52 |
| Editing | Wendell Crowley |
| Characters | Captain Marvel [Billy Batson]; Captain Marvel, Jr. [Freddy Freeman]; Mary Marvel [Mary Batson] |
| Genre | superhero |
| Pencils | Jack Binder? |
| Inks | Pete Costanza? |
| Characters | Captain Marvel [Billy Batson]; Captain Marvel, Jr. [Freddy Freeman]; Mary Marvel [Mary Batson]; Satyr (first appearance); Hydra (first appearance); Argus (first appearance) |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | C. C. Beck |
| Inks | C. C. Beck |
| Reprinted | in Limited Collectors' Edition (DC, 1972 series) #C-27 (1974) |
| Genre | Gags |
| Script | Howard Boughner |
| Pencils | Howard Boughner |
| Inks | Howard Boughner |
| Genre | Gags |
| Characters | Mary Marvel [Mary Batson] |
| Genre | superhero |
| Pencils | Jack Binder? |
| Inks | Jack Binder? |
| Genre | sports |
| Characters | Captain Marvel, Jr. [Freddy Freeman]; Sivana, Jr. (villain); Man-From-Mars (first appearance; villain); a Frankensteinian monster (first appearance; villain) |
| Genre | superhero |
| Pencils | Kurt Schaffenberger |
| Inks | Kurt Schaffenberger |
| Characters | Eando Chesler |
| Script | Rod Reed [as Cy N. Sphixon] |
| Letters | typeset |
| Characters | Captain Marvel [Billy Batson]; Sivana (villain) |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Pete Costanza |
| Inks | Pete Costanza |