- Script
- Otto Binder
- Pencils
- Pete Riss
- Inks
- ?
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Mary Marvel [Mary Batson]; King Krag (first appearance; villain)
Artist credit by Martin O'Hearn.
- Script
- Bill Woolfolk
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Captain Marvel, Jr. [Freddy Freeman]; Prof. Edgewise; The Beastman [Sir Reginald Framingham] (first appearance; villain)
story "borrows" from Dr. Jekyll and Mr. Hyde
Writer credit by Martin O'Hearn