Comic Title: Justice League of America #63
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: June 1968
On Sale Date: April 25, 1968 Newsstand Date April 25, 1968
Source: Direct Currents, Metal Men #32, Page 31

Copyright Date April 25, 1968
Source: Library of Congress, Periodicals 1968

Newsstand Date April 25, 1968
Source: Comic Reader, #65

Frequency: Monthly with the exception of Jan., Apr., July and Oct.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "Time Signs a Death-Warrant for the Justice League"
Pages: 23

Feature(s):
Justice League of America (of Earth-1)

Writer: Gardner F. Fox
Penciller: Mike Sekowsky
Inker: George Roussos

Reprinted In:
Justice League of America Archives Vol. 8 HC (2003)
Showcase Presents:Justice League of America Vol. 4 TPB (2009)
Justice League of America:The Silver Age Omnibus Vol. 2 HC (2016)

Feature Character(s)

• Justice League of America (last appearance in Action Comics #366; next appearance in Justice League of America #240)
• Superman (last appearance in Superman's Pal Jimmy Olsen #111; next appearance in World's Finest Comics #176)
• Batman (last appearance in Brave and the Bold #78; next appearance in World's Finest Comics #176)
• Wonder Woman (last appearance in Brave and the Bold #78; next appearance in Justice League of America #240)
• Flash (last appearance in Flash #181; next appearance in Justice League of America #240)
• Green Lantern (last appearance in Action Comics #366; next appearance in Justice League of America #240)
• Aquaman (last appearance in Action Comics #366; next appearance in Justice League of America #240)
• Green Arrow (last appearance in Action Comics #365; next appearance in Justice League of America #65)
• Atom (last appearance in Action Comics #365; next appearance in Justice League of America #240)
• Hawkman (last appearance in Action Comics #365; next appearance in Justice League of America #240)

Supporting Character(s)

• Snapper Carr (last appearance in Justice League of America #61; next appearance in Justice League of America #65)

Villain(s)

• Key (last appearance in Justice League of America #41; next appearance in Justice League of America #110)
• The Key-Men (last appearance in Justice League of America #41; next appearance in Justice League of America #110)

Other Character(s)

• A group of time-traveling tourists from the future and their guide (no further appearances)

Comments:
Green Lantern is the chairman of the JLA meeting in this story.

Following this story, the Justice League encounters Dr. Anomaly, as revealed in Justice League of America #240.

Superman temporarily switches time periods with a version of himself from three years earlier.

Synopsis:
In a gambit set in motion during his initial encounter with the Justice League, the Key gives the super-heroes an irresistible command not to leave their headquarters for one hour, and at the end of that time to kill each other. They find themselves unable to leave the Secret Sanctuary, until Superman finds a way out, by time-traveling three years into the past, thus catapulting his past self into the future to take his place. Th Superman-of-three-years-past is unaffected by the Key's command, and so is able to extricate his fellow members from their predicament by overpowering them all and forcing them out of the meeting room.

The entire team then battles the Key and his men, but as the one-hour deadline draws near, Superman is again forced to battle and defeat the other members, knocking them unconscious before they can carry out the Key's deadly orders and kill each other. He then forces the Key to countermand his deadly order.

Later, the members determine which of them was to have killed which: Snapper Carr was to have been Superman's executioner, using concealed Kryptonite, while the returned Superman-of-the-present reveals that his victim was to have been Batman. In the near past, he avoided the kill-command by having Green Lantern and Wonder Woman join forces to subdue him until the danger had passed. This entire adventure is seen through the eyes of time-traveling tourists from the future.