| Script: | Jack Cole (signed) |
| Pencils: | Jack Cole (signed) |
| Inks: | Jack Cole (signed) |
| Colors: | ? |
| Letters: | ? |
| Script: | |
| Pencils: | Alex Kotzky (signed) |
| Inks: | Alex Kotzky (signed) |
| Colors: | ? |
| Letters: | ? |
Writer credits by Craig Delich.
Will Eisner created the Espionage feature, and Will Erwin was a pen name used by Will Eisner (Erwin was Eisner's middle name), but it also became a house by-line after Eisner's tenure after 1940. Lane French wrote the feature in 1941, followed by Toni Blum (1942) and Otto Binder (1942-43).
| Script: | Paul Gustavson (signed) |
| Pencils: | Paul Gustavson (signed) |
| Inks: | Paul Gustavson (signed) |
| Colors: | ? |
| Letters: |
Gustavson credits from Terry Gustafson, son of Paul Gustavson.
| Script: | Robert Turner (signed) |
| Pencils: | Jim Mooney (signed) |
| Inks: | Jim Mooney (signed) |
| Colors: | ? |
| Letters: | ? |
| Script: | George Brenner (signed as Wayne Reid) |
| Pencils: | George Brenner (signed as Wayne Reid) |
| Inks: | George Brenner (signed as Wayne Reid) |
| Colors: | ? |
| Letters: | ? |
| Script: | ? |
| Pencils: | Alex Blum (signed as S. M. Regi) |
| Inks: | Alex Blum (signed as S. M. Regi) |
| Colors: | ? |
| Letters: | ? |
| Script: | Vern Henkel (signed) |
| Pencils: | Vern Henkel (signed) |
| Inks: | Vern Henkel (signed) |
| Colors: | ? |
| Letters: | ? |