| Issue | #21 |
| Published | December 1948 |
| Frequency | bi-monthly |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Victor Fox |
| Genre | superhero |
| Pencils | Matt Baker |
| Inks | Matt Baker |
| Characters | Phantom Lady; Jack-In-the-Box [Mrs. Wilks] (first appearance; villain; death) |
| Genre | superhero |
| Script | Ruth Roche? [as Gregory Page] |
| Pencils | Jack Kamen |
| Inks | Jack Kamen? |
| Genre | detective |
| Script | B. Tirago |
| Pencils | B. Tirago |
| Inks | B. Tirago |
| Characters | Phantom Lady; The Chessman [Algernon Blackwood] (first appearance; villain) |
| Genre | superhero |
| Script | Ruth Roche? [as Gregory Page] |
| Pencils | Matt Baker (pages 1-2); ? (pages 3-10) |
| Notes | It appears that only the first 2 pages of this story were pencilled by Matt Baker; the rest is clearly by someone else. |
| Letters | typeset |
| Genre | crime; fact |
| Notes | crime story narrated by Phantom Lady |