| Issue | #21 |
| Published | April 1941 |
| Cover Price | 0.10 USD |
| Pages | 68 |
| Editing | Victor Fox |
| Characters | Blue Beetle [Dan Garrett] |
| Pencils | Charles Nicholas? |
| Inks | Charles Nicholas? |
| Characters | Blue Beetle [Dan Garrett]; Hook Tigo (first appearance; villain; death); Dwarf (first appearance; villain) |
| Pencils | Charles Nicholas |
| Inks | Charles Nicholas |
| Characters | Rex Dexter |
| Script | Dick Briefer |
| Pencils | Dick Briefer |
| Inks | Dick Briefer |
| Notes | story based on Coleridge's Rime of the Ancient Mariner |
| Characters | Green Mask [Michael Shelby]; Baldy Fluger (first appearance; villain); Dr. Doe (first appearance); Lucy Doe (first appearance) |
| Pencils | Walter Frehm |
| Inks | Walter Frehm |
| Characters | Lt. Drake; The Three Outcasts [Boris (first appearance; villain; death); two others (first appearance; villains; death)]; Miss X |
| Pencils | Klaus Nordling? |
| Inks | Klaus Nordling? |
| Characters | Chen Chang (villain) |
| Pencils | Munson Paddock [as Cecilia Munson] |
| Inks | Munson Paddock |
| Script | Nathaniel Nitkin [as N. N. Nathaniel] |
| Letters | typeset |
| Characters | Lynx [Jim]; The Rook (first appearance; villain); Baldy (first appearance; villain); Sonia (first appearance; villain) |
| Pencils | ? (Norton Kingsley) |
| Characters | John Geer (first appearance; villain) |
| Pencils | Pierce Rice? |
| Characters | D-13 [Richard Anthony]; Nick Colucci (first appearance; villain); Count Von Backenger (first appearance; villain; death) |
| Script | Bert Whitman? |
| Pencils | Bert Whitman? |
| Inks | Bert Whitman? |