| Issue | #21 |
| Published | November-December 1975 |
| Frequency | bi-monthly |
| Cover Price | 0.25 USD |
| Pages | 36 |
| Editing | Julius Schwartz; E. Nelson Bridwell (associate editor); Bob Rozakis (assistant editor) |
| Characters | Captain Marvel [Billy Batson] |
| Genre | superhero |
| Pencils | Bob Oksner |
| Inks | Bob Oksner |
| Notes | Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. [August 2007]. Pencils previously credited to Ernie Chan. |
| Reprinted | In Showcase Presents Shazam (DC, 2007 series) #1 |
| Characters | Captain Marvel [Billy Batson]; Professor Edgewise; Mork-El |
| Synopsis | Captain Marvel travels to the year 81,953 and discovers that the land is ruled by giant rats, and mankind is reduced to hiding underground. |
| Genre | superhero |
| Script | William Woolfolk |
| Pencils | C. C. Beck |
| Inks | Pete Costanza |
| Reprinted | from Captain Marvel Adventures (Fawcett, 1941 series) #145 (June 1953) |
| Script | E. Nelson Bridwell |
| Letters | typeset |
| Genre | Superhero |
| Pencils | Curt Swan |
| Inks | Vince Colletta |
| Notes | Ad for Hostess Twinkies. |
| Characters | Captain Marvel, Jr. [Freddy Freeman]; Red O'Riley; Dakmore (villain) |
| Synopsis | Captain Marvel Jr. and his friend Red find a city in the desert. This city only appears once every thousand years. |
| Genre | superhero |
| Script | William Woolfolk |
| Pencils | Bud Thompson |
| Inks | Bud Thompson |
| Reprinted | from Captain Marvel, Jr. (Fawcett, 1942 series) #106 (February 1952) |