| Issue | #51 |
| Published | March-April 1948 |
| Cover Price | 0.10 |
| Pages | 52 |
| Editing | Whitney Ellsworth, [Jack Schiff, Mort Weisinger] |
| Notes | last Siegel and Shuster by-lines in this issue. |
| Characters | Lois Lane |
| Genre | superhero |
| Pencils | Wayne Boring |
| Inks | Stan Kaye |
| Notes | last Siegel and Shuster by-lines in this issue. |
| Characters | Villain: Mr. Mxyztplk; Intro: King (not Brpxz) and Princess of Mxyztplk's world; Lois Lane, Perry White |
| Synopsis | Mxyztplk tries to get Lois Lane to marry him, so he won't have to marry the king's daughter. |
| Genre | superhero |
| Script | Alvin Schwartz |
| Pencils | Win Mortimer |
| Inks | Win Mortimer |
| Notes | Mxyztplk's home called Topsy Turvy World, instead of Zrfff. Writer verified by Martin O'Hearn. |
| Characters | Villain: Mr. Ohm (Intro), Lois Lane, Perry White |
| Genre | superhero |
| Script | Alvin Schwartz |
| Pencils | Win Mortimer |
| Inks | Win Mortimer |
| Notes | writer verified by Martin O'Hearn |
| Script | Cliff Rhodes |
| Letters | typeset |
| Characters | Superman; Pudge Purdy (villain, intro); Lois Lane |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Steve Brodie? |
| Notes | Rehashed in Superman (DC, 1939 series) #130 and in Three-Dimension Adventures Superman #[nn]. |
| Genre | gag |
| Script | Henry Boltinoff (signed) |
| Pencils | Henry Boltinoff (signed) |
| Inks | Henry Boltinoff (signed) |