| Issue | #256 |
| Published | September 1959 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Mort Weisinger |
| Characters | Superman; Lois Lane |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Stan Kaye |
| Reprinted | in Showcase Presents Superman (DC, 2005 series) #1 |
| Characters | Superman; Lois Lane; Dirk Folgar [Agent X-3] (villain) |
| Synopsis | Superman poses as the Future Superman, who has the power to predict the future, to smoke out Agent X-3 and prevent an attempt on the life of the President. |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Curt Swan |
| Inks | Stan Kaye |
| Reprinted | in Superman Annual (DC, 1960 series) #3 (Summer 1961); in Showcase Presents Superman (DC, 2005 series) #1 |
| Characters | Professor Eureka |
| Genre | Gag |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |
| Notes | Title, first line and reprint data from Arthur Lortie, added August 2006. |
| Reprinted | from Action Comics (1938 series) #183 (DC, 1953) |
| Characters | Congo Bill; Janu; Congorilla; Golden Gorilla; Percy Pierce (villain) |
| Genre | superhero; jungle |
| Pencils | Howard Sherman |
| Inks | Howard Sherman |
| Notes | Janu becomes Congorilla. |
| Letters | typeset |
| Characters | Supergirl; Dick Wilson [later Dick Malverne]; Supergirl Robot |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Notes | Intro Dick Wilson, who is reintro'ed in 282 as Dick Malverne |
| Reprinted | in Adventure Comics (DC, 1938 series) #390 (March 1970); in Best of DC, The (DC, 1979 series) #17; in Supergirl Archives (DC, 2001 series) #1; in Showcase Presents: Supergirl (DC, 2007 series) #1 |