| Issue | #138 |
| Published | August 1948 |
| Cover Price | 0.10 |
| Pages | 52 |
| Editing | Whitney Ellsworth (credited); Jack Schiff (actual) |
| Characters | Batman; Robin; The Joker (silhouette). |
| Genre | superhero |
| Pencils | Winslow Mortimer |
| Inks | Winslow Mortimer |
| Reprinted | In The Batman Archives (DC, 1990 series) #7 (November 2007). |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; Dr. Walter Timmins (first appearance); Mr. Laird (first appearance); Mr. Stacy (first appearance); Mr. Morse (first appearance); The Joker (villain). |
| Synopsis | The Joker follows up an article in the newspaper about a scientist discovering a lost elixir of invisibility and becomes a real terror to Batman until the crime fighter takes some of the elixir himself. |
| Genre | superhero |
| Script | Bill Finger? |
| Pencils | Dick Sprang |
| Inks | Dick Sprang |
| Notes | Pencil credit verified by Sprang. Inker credit revised & verified by Craig Delich (Nov. 2005). Inker credit previously given to Howard Sherman? Gene McDonald? Synopsis added by Craig Delich 1-5-08. |
| Reprinted | In The Batman Archives (DC, 1990 series) #7 (November 2007). |
| Characters | Robotman [Paul Dennis] |
| Genre | superhero |
| Script | Otto Binder (credit by Martin O'Hearn) |
| Pencils | Jimmy Thompson |
| Inks | Jimmy Thompson |
| Notes | Origin retold, series continues from Star- Spangled Comics. |
| Reprinted | In World's Finest Comics (DC, 1941 series) #208 (December 1971). |
| Characters | Slam Bradley; Shorty Morgan. |
| Genre | detective |
| Pencils | Howard Sherman |
| Inks | Howard Sherman |
| Notes | Inker credit revised and verified by Craig Delich (Nov. 2005). Inker credit previously given to John Daly. |
| Characters | Shorty |
| Genre | gag |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |
| Genre | fact |
| Script | Henry Lysing (signed) |
| Letters | typeset |
| Characters | The Boy Commandos [Rip Carter; Brooklyn; Andre; Tex]. |
| Genre | war; adventure |
| Pencils | Curt Swan |
| Inks | Steve Brodie |
| Characters | Daffy; Doodle. |
| Genre | humor |
| Pencils | ? (signed as Lit-Win) |
| Inks | ? (signed as Lit-Win) |
| Notes | Lit-Win is a pen name for an unknown artist whom Jack Burnley saw in the DC offices often, but he couldn't remember the man's true name. |