| Issue | #12 |
| Published | May 1947 |
| Cover Price | 0.10 |
| Pages | 36 |
| Editing | ? |
| Characters | Mary Marvel; Georgia Sivana |
| Genre | superhero |
| Pencils | Jack Binder |
| Inks | Jack Binder |
| Characters | Mary Marvel (Mary Batson); V: Georgia Sivana |
| Synopsis | As Georgia Sivana leaves the reform school, Mary advises her to go straight and she promises to do so. But, later at a party that Mary gave, she works her wickedness on a young man and provides him with her latest invention: a ray that turns people green! |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Jack Binder |
| Inks | Jack Binder |
| Notes | Much info added by Craig Delich (September 1, 2007). |
| Reprinted | in Mary Marvel Fanzine (Mike Bromberg, 2004 series) #6 (June 2006) |
| Characters | Freddie |
| Genre | teen humor |
| Genre | adventure |
| Script | Lawrence Steinfeldt (signed) |
| Letters | typeset |
| Characters | Mary Marvel (Mary Batson); Creighton Tinkerman |
| Synopsis | Creighton takes Mary in his invention, the time machine, 100 years into the future, only to discover a rare of midgets who live and work in a giant bee hive colony ruled by an evil Queen. |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Jack Binder |
| Inks | Jack Binder |
| Notes | Much info added by Craig Delich (September 1, 2007). |
| Reprinted | in Mary Marvel Fanzine (Mike Bromberg, 2004 series) #6 (June 2006) |
| Characters | Mary Marvel (Mary Batson) |
| Synopsis | As Mary and her mother are working on charity projects, they hear of a missing ship called the "Flying Scotsman", but when Mary locates the ship in the mid-Atlantic, she discovers some force repels her and any other object away from it, making it impossible for the ship to dock. |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Jack Binder |
| Inks | Jack Binder |
| Notes | Much info added by Craig Delich (September 1, 2007). |
| Reprinted | in Mary Marvel Fanzine (Mike Bromberg, 2004 series) #6 (June 2006) |