Data courtesy of the Grand Comics Database under Creative Commons license.

Issue Details

Issue #21
Published August 1963
Cover Price 0.12
Pages 36
Editing Julius Schwartz
Notes Lettering credit from reprint in JLA Archives.

Cover Details - "Crisis on Earth-One!"

Characters Hawkman [Carter Hall, of Earth-2]; Dr. Fate [Kent Nelson, of Earth-2]; Black Canary [Dinah Lance, of Earth-2]; Green Lantern [Alan Scott]; Hourman [Rex Tyler]; The Atom [Al Pratt]; Wonder Woman [of Earth-1]; Martian Manhunter [John Jones/J'onn J'onzz]; Green Lantern [Hal Jordan]; Aquaman; Green Arrow [Oliver Queen, of Earth-1]; The Atom [Ray Palmer]; Batman [of Earth-1]; Superman [of Earth-1]
Genre superhero
Pencils Mike Sekowsky
Inks Murphy Anderson
Letters Ira Schnapp
Notes Lettering credit from reprint in JLA Archives.
Reprinted in Crisis on Multiple Earths (DC, 2002 series) #nn [1]; in Justice League of America Archives, The (DC, 1992 series) #3; in Showcase Presents: Justice League of America (DC, 2005 series) #2

25 page Justice League of America story "Crisis on Earth-One!"

Characters Aquaman; The Atom [Ray Palmer]; The Flash [Barry Allen]; Green Arrow [Oliver Queen, of Earth-1]; Green Lantern [Hal Jordan]; Martian Manhunter [John Jones/J'onn J'onzz]; Batman [or Earth-1]; Superman [of Earth-1]; Wonder Woman [of Earth-1] (all as the Justice League of America/JLA); The Atom [Al Pratt]; Black Canary [Dinah Lance, of Earth-2]; Dr. Fate [Kent Nelson, of Earth-2]; The Flash [Jay Garrick]; Green Lantern [Alan Scott]; Hawkman [Carter Hall, of Earth-2]; Hourman [Rex Tyler] (all as the Justice Society of America/JSA); Felix Faust; Dr. Alchemy; Chronos; The Wizard; The Fiddler; The Icicle (all as the Crime Champions)
Synopsis 3 villains each from Earth-1 and Earth-2 hatch a plot to commit crimes, then hide out on the other Earth. To ensure their success, the villains of Earth-1 mystically trap the JLA in their headquarters. But the JLA summons the JSA and switches places with them.
Genre superhero
Script Gardner Fox
Pencils Mike Sekowsky
Inks Bernard Sachs
Letters Gaspar Saladino
Notes 1st JLA-JSA Team up. Story continued in Justice League of America #22. Lettering credit from reprint in JLA Archives.
Reprinted in DC 100-Page Super Spectacular (DC, 1971 series) #6; in Greatest Team-Up Stories Ever Told, The (DC, 1989 series) #nn; in Crisis on Multiple Earths (DC, 2002 series) #nn [1]; in Justice League of America Archives, The (DC, 1992 series) #3; in Showcase Presents: Justice League of America (DC, 2005 series) #2; in DC 100-Page Super Spectacular No. 6 Replica Edition (DC, 2004 series) #[nn]