| Issue | #256 |
| Published | April-May 1979 |
| Cover Price | 1.00.USD |
| Pages | 68 |
| Editing | Jack Harris |
| Notes | Circulation statement: 85,000 average; 63,000 latest. |
| Characters | Superman; Batman; Lar-On; Sandy Terry |
| Genre | superhero |
| Pencils | Ross Andru |
| Inks | Dick Giordano |
| Notes | Wrap-around cover. |
| Script | Jack Harris |
| Pencils | Dick Giordano |
| Inks | Dick Giordano |
| Notes | inside front cover |
| Characters | Batman; Superman; General Zod; Lar-On; Professor Jeremiah Terry; Sandy Terry |
| Genre | superhero |
| Script | Dennis O'Neil |
| Pencils | Murphy Anderson |
| Inks | Murphy Anderson |
| Colors | Gene D'Angelo |
| Letters | Ben Oda |
| Characters | With Black Lightning; Green Arrow; Vs. Tobias Whale |
| Genre | superhero |
| Script | Dennis O'Neil |
| Pencils | Dick Dillin |
| Inks | Frank Chiaramonte |
| Colors | Jerry Serpe |
| Letters | Ben Oda |
| Notes | lead-in to Black Lightning strip next issue. |
| Characters | Black Canary; Green Arrow |
| Genre | superhero |
| Script | Gerry Conway |
| Pencils | Jose Delbo |
| Inks | Vince Colletta |
| Colors | Jerry Serpe |
| Letters | Milt Snapinn |
| Characters | With Superman. Vs the Harpies from Hawkman #8. Hawkgirl; Hawkman |
| Genre | superhero |
| Script | Steve Englehart |
| Pencils | Murphy Anderson |
| Inks | Murphy Anderson |
| Colors | Gene D'Angelo |
| Letters | Ben Oda |
| Editing | Julius Schwartz |
| Notes | Continued from the Showcase 101-103 run. Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007). Story was purchased by Schwartz to be run in Detective Comics, but the feature was moved to World's Finest Comics. |
| Characters | Captain Marvel; Mary Marvel; The Gamester; Merrill Batson; Jocelyn Batson; Miss Jameson |
| Genre | superhero |
| Script | E. Nelson Bridwell |
| Pencils | Don Newton |
| Inks | Kurt Schaffenberger |
| Colors | Adrienne Roy |
| Letters | Gaspar Saladino; Milt Snapinn |