| Issue | #48 |
| Published | November-December 1966 |
| Cover Price | 0.25 |
| Pages | 84 |
| Editing | Julius Schwartz |
| Notes | Also numbered as Giant G29. Lettering credit from reprint in JLA Archives. |
| Characters | Superman; Batman; Wonder Woman; Green Lantern [Hal Jordan]; Martian Manhunter [J'onn J'onzz]; Aquaman; The Flash [Barry Allen]; Kanjar Ro |
| Genre | superhero |
| Pencils | Mike Sekowsky |
| Inks | Murphy Anderson |
| Letters | Ira Schnapp |
| Notes | Also numbered as Giant G29. Lettering credit from reprint in JLA Archives. |
| Reprinted | in Justice League of America Archives, The (DC, 1992 series) #6 |
| Characters | Aquaman; Batman; Green Lantern [Hal Jordan]; Martian Manhunter [J'onn J'onzz]; The Flash [Barry Allen]; Wonder Woman; Superman; Snapper Carr (all as the Justice League of America); Xotar (villain) |
| Synopsis | Having found an ancient book that appears to indicate that he once defeated the JLA, Xotar travels from 11,960 to the present to test four weapons against the Justice League, in order to determine which weapon will help him defeat the Intersolar Police of his own day. But the JLA counters each of Xotar's weapons and returns him to face justice in his own time. |
| Genre | superhero |
| Script | Gardner Fox |
| Pencils | Mike Sekowsky |
| Inks | Bernard Sachs |
| Notes | 1 page cut |
| Reprinted | from Brave and the Bold, The (DC, 1955 series) #29 (April-May 1960) |
| Characters | Green Lantern [Hal Jordan]; Wonder Woman; The Flash [Barry Allen]; Martian Manhunter [J'onn J'onzz]; Aquaman; Batman; Superman; Snapper Carr (all as the Justice League of America/JLA); Merlin; Mandini the Mage; Simon Magus (villain); The Troll King (villain); Saturna (villain); the Manticore; the Griffin; Jimmy Carr (cameo) |
| Genre | superhero |
| Script | Gardner Fox |
| Pencils | Mike Sekowsky |
| Inks | Bernard Sachs |
| Notes | 1 page cut |
| Reprinted | from Justice League of America (1960) #2 Dec-Jan 1960-61 |
| Characters | Flash [Barry Allen]; Green Lantern [Hal Jordan]; Martian Manhunter [J'onn J'onzz]; Batman; Aquaman; Wonder Woman; Superman; Snapper Carr (all as the Justice League of America/JLA); Kanjar Ro (villain); Hyathis (villain); Kromm (villain); Sayyar (villain) |
| Genre | superhero |
| Script | Gardner Fox |
| Pencils | Mike Sekowsky |
| Inks | Bernard Sachs |
| Notes | 4 pages cut |
| Reprinted | from Justice League of America (1960) #3 Feb-Mar 1961 |