| Issue | #4 |
| Published | August 1940 |
| Frequency | monthly |
| Cover Price | 0.10 USD |
| Pages | 68 |
| Editing | Joe Simon |
| Notes | MYSTIC COMICS published monthly by Timely Publications at Meriden, Conn. Entered as second class matter at Post Office at Meriden, Conn., under Act of March 3, 1879. Yearly subscription in U. S. $1.00. Vol. 1, No 4, July 1940. Entire contents copyright 1940 by Timely Publications, 330 W. 42nd St., N. Y., N. Y. Printed in U. S. A. For advertising write Marvel Group, 330 W. 42nd St., N. Y. C. |
| Characters | Hercules David |
| Genre | superhero |
| Pencils | Alex Schomburg |
| Inks | Alex Schomburg |
| Letters | typeset |
| Notes | Inside front cover. |
| Characters | Blue Blaze [Spencer Keen] |
| Synopsis | The Blue Blaze, who is now described as returning to the grave between adventures, takes on an organization that's using a hate ray to goad two neighboring countries to war. |
| Genre | superhero |
| Pencils | ? [as Harry] (signed); ? [as Douglas] (signed) |
| Inks | ? [as Harry] (signed); ? [as Douglas] (signed) |
| Notes | Story signed as "Harry / Douglas", not a single name "Harry Douglas" as previously credited. Jerry Bails' Who's Who lists Harry / Douglas as an art team consisting of Harry Ramsey and either Douglas Grant or Douglas Ryan. However the art style is very different from the Harry / Douglas signed story in issue #1. There is a teaser for a story in which the Blue Blaze fights the Vampire of Doom next issue, but that story never appeared. |
| Characters | Hercules David |
| Synopsis | Hercules fights a mad scientist who wants to rule the world or smash it to bits with his monster earth-shaking machine. The scientist captures Hercules and tries to mentally enslave him, but Hercules is too strong. |
| Genre | superhero |
| Notes | This story does not appear to be drawn by the same artist as in the previous issue. |
| Characters | Thin Man [Bruce Dickson] (introduction; origin); Olalla |
| Synopsis | Bruce Dickson stumbles on a utopia in the Himalayas and its people welcome him, granting him the power they all have to become exceedingly thin through surgery with their electric rays. He is shown their science and their peaceful communication with the Martians, but convinces them to let him return to the outside world to fight crime. The Elder's daughter, Olalla, goes with him and on their first adventure they put a stop to a protection racket. |
| Genre | superhero |
| Pencils | Klaus Nordling [signed as K. Nordling] |
| Inks | Klaus Nordling [signed as K. Nordling] |
| Characters | Flexo; Joel Williams; Joshua Williams |
| Synopsis | The Williams brothers take Flexo to Teutonia to retrieve a stolen explosives formula. |
| Genre | superhero |
| Script | Ben Flinton [as FOS] (signed) |
| Pencils | Bill O'Connor [as FOS] (signed) |
| Inks | Leonard Sansome [as FOS] (signed) |
| Notes | We have Ben Flinton listed as the writer, but Who's Who has him down as pencils/inks. There is a teaser for another Flexo story in the next issue but it never appeared. |
| Characters | Black Widow [Claire Voyant] (introduction; origin); Satan |
| Synopsis | Spirit medium Claire Voyant, momentarily influenced by Satan, curses a family after they doubt her skills. When the mother and daughter of the family die, the son blames Claire and kills her. Satan claims her soul and transforms her into the Black Widow. After giving her a tour of Hell, he allows her to go back to earth and avenge herself by killing her own murderer. Satan then tells the Black Widow that her role will be to collect the souls of evil men on earth at his direction. |
| Genre | superhero |
| Script | George Kapitan (signed) |
| Pencils | Harry Sahle (signed) |
| Inks | Harry Sahle (signed) |
| Characters | Invisible Man [Dr. Gade] |
| Synopsis | The Invisible Man discovers a murder behind an apparent suicide. |
| Genre | superhero |
| Pencils | George Harrison [as Geo. Harrison] (signed) |
| Inks | George Harrison [as Geo. Harrison] (signed) |
| Notes | Several of Dr. Gade's speech balloons start with parenthetical notes like "(Thinking)" or "(Loudly)". There is a teaser for another Dr. Gade story in the next issue, but it never appeared. |
| Script | Andrew McWhiney (signed) |
| Pencils | Bill Everett (signed) |
| Inks | Bill Everett (signed) |
| Notes | Text with illustrations. |
| Characters | Merzah (introduction); Diana (introduction); Jose (introduction) |
| Synopsis | After a train is wrecked by sabotage, Merzah, his assistant Diana and his driver Jose take down the spy/sabotage organization which is trying to steal plans for an unsinkable lifeboat. |
| Genre | superhero; occult |
| Pencils | Russ Lanford (signed) |
| Inks | Russ Lanford (signed) |
| Notes | The last panel shows a telegram to Merzah giving his address as "Mystic Comics, New York City NY". |
| Characters | Dynamic Man [Curt Cowan]; Chief Hopkins |
| Synopsis | Dynamic Man investigates jewelry store robberies in which only gold was stolen. He discovers a scientist who is using a "magnet" that affects only gold to commit crimes. The scientist uses his new dirigible with this magnet to steal more gold, and Dynamic Man must chase him across the Atlantic Ocean. |
| Genre | superhero |
| Letters | typeset |
| Notes | Inside back cover. |
| Characters | Angel [Thomas Halloway]; Human Torch [Jim Hammond]; Sub-Mariner [Namor] |
| Genre | superhero |
| Pencils | Alex Schomburg |
| Inks | Alex Schomburg |
| Notes | Back cover. Contains a nearly full-size non-colored reprint of the cover to Marvel Mystery Comics (Marvel, 1939 series) #8. |