| Issue | #5 |
| Published | June 1941 |
| Cover Price | 0.10 USD |
| Pages | 68 |
| Editing | Victor Fox |
| Notes | art credit via Jim Vadeboncoeur Jr 28-2-2009 |
| Characters | The Green Mask [Michael Shelby]; Domino [Don] |
| Genre | superhero |
| Pencils | Harry Fisk |
| Inks | Harry Fisk |
| Notes | art credit via Jim Vadeboncoeur Jr 28-2-2009 |
| Characters | Green Mask [Michael Shelby]; Dr. Tsu (first appearance; villain; death); Lo Lan (first appearance; villain; death) |
| Pencils | Walter Frehm? |
| Inks | Walter Frehm? |
| Characters | Green Mask [Michael Shelby]; Kurt Ebler (first appearance; villain); Scar Lapone (first appearance; villain) |
| Pencils | Walter Frehm? |
| Inks | Walter Frehm? |
| Script | Nathaniel Nitkin [as N. N. Nathaniel] |
| Letters | typeset |
| Characters | Green Mask [Michael Shelby]; Lana Gebb (first appearance; villain); Hans Funkel (first appearance; villain) |
| Pencils | Walter Frehm? |
| Inks | Walter Frehm? |
| Characters | Madam Kakymamie (first appearance; villain; death) |
| Pencils | Sid Greene |
| Inks | Sid Greene |
| Notes | Jim Vadeboncoeur notes "Sid Greene sneaked on book cover on page 6" 28-2-2009 |
| Pencils | Ray Willner |
| Inks | Ray Willner |
| Notes | app. between MYSTERY MEN COMICS #23, 24; art credit by Jim Vadeboncoeur 28-2-2009 |
| Notes | Jim Vadeboncoeur states Bert Whitman did not create this story 2-28-2009 |