| Issue | #21 |
| Published | Winter 1945 |
| Cover Price | 0.10 USD |
| Pages | 52 |
| Editing | Sheldon Mayer; Ted Udall (assistant editor); Julius Schwartz (assistant editor) |
| Characters | The Flash; the Turtle; Winky; Blinky; Noddy |
| Genre | superhero |
| Pencils | Martin Naydel (signed as Mn) |
| Inks | Martin Naydel (signed as Mn) |
| Notes | Cover carries the DC bullet once again. |
| Characters | The Flash [Jay Garrick]; Monk Holmes (villain) |
| Synopsis | Monk Holmes has discovered an ancient Indian ceremonial fire that has the odd ability to turn worthless scrap metal into solid gold. |
| Genre | superhero |
| Script | Gardner F. Fox |
| Pencils | Martin Naydel |
| Inks | Martin Naydel |
| Notes | Writer credit by Craig Delich 3/03. Some info and synopsis added by Craig Delich 8-22-09. |
| Characters | Mutt; Jeff |
| Genre | humor |
| Script | Al Smith [as Bud Fisher] (signed) |
| Pencils | Al Smith [as Bud Fisher] (signed) |
| Inks | Al Smith [as Bud Fisher] (signed) |
| Letters | Al Smith |
| Notes | Newspaper reprints. |
| Characters | The Flash [Jay Garrick]; The Turtle (villain, 1st appearance); Winky; Blinky; Noddy |
| Synopsis | The Tghree Dimwits learn some mighty erroneous ideas from the Turtle, a new villain that contends the slower you commit a crime, the more successful it will be! |
| Genre | superhero |
| Script | Gardner F. Fox |
| Pencils | Martin Naydel |
| Inks | Martin Naydel |
| Notes | Writer credit by Craig Delich 3/03. Some info and synopsis added by Craig Delich 8-22-09. |
| Characters | Mutt; Jeff |
| Genre | humor |
| Script | Al Smith [as Bud Fisher] (signed) |
| Pencils | Al Smith [as Bud Fisher] (signed) |
| Inks | Al Smith [as Bud Fisher] (signed) |
| Letters | Al Smith |
| Notes | Newspaper reprints. |
| Genre | adventure |
| Script | Jim Robinson (signed) |
| Letters | typeset |
| Characters | Watt |
| Genre | gag |
| Script | Ronald Santi |
| Pencils | Ronald Santi |
| Inks | Ronald Santi |
| Letters | Ronald Santi |
| Notes | Credits revised from Ed Wheelan to Ronald Santi by Craig Delich 8-22-09. |
| Characters | The Flash [Jay Garrick]; Winky; Blinky; Noddy |
| Synopsis | The Three Dimwits are hired by an expert window decorator to come up with some original displays. They do --- but they're unaware their boss is a crook and is using their displays to hide stolen property! |
| Genre | superhero |
| Script | Gardner F. Fox |
| Pencils | Martin Naydel |
| Inks | Martin Naydel |
| Notes | Writer credit by Craig Delich 3/03. Some info and synopsis added by Craig Delich 8-22-09. |