CATALOG RECORD

Justice League of America #21

DC · Series began 1960 · August 1963

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Dates

Cover date: August 1963
On sale: June 20, 1963
Pages: 36

Editions and covers

Original edition
Source ↗

Facsimile reprints exist

Justice League of America 21 (Facsimile Edition) (2026). A facsimile reproduces this issue with a modern cover price and barcode; check before buying.

Creators

pencils: Mike Sekowsky, Curt Swan, Dick Sprang, Sheldon Moldoff, Ruben Moreira, Kurt Schaffenbergerinks: Murphy Anderson, Bernard Sachs, George Klein, Stan Kaye, Charles Paris, Ruben Moreira, Kurt Schaffenbergerletters: Ira Schnapp, Gaspar Saladinoscript: Gardner Fox, Jack Schiff, Julius Schwartz

Stories

Crisis on Earth-One! · 24 pages
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 Justice League of America in their headquarters. But the Justice League of America summons the Justice Society of America and switches places with them.

Reprinted in

The Justice League of America Omnibus (2014), DC 100-Page Super Spectacular (1971), The Greatest Team-Up Stories Ever Told (1989), The Greatest Team-Up Stories Ever Told (1990), Justice League of America Archives (1992), Crisis on Multiple Earths (2002), DC 100-Page Super Spectacular No. 6 Replica Edition (2004), Showcase Presents: Justice League of America (2005), Justice Society of America: A Celebration of 75 Years (2015), Justice League of America: The Silver Age (2016), Justice League of America: The Silver Age Omnibus (2016), Crisis on Multiple Earths (2021), Justice League of America 21 (Facsimile Edition) (2026)