Comic Title: Justice League of America #77
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: December 1969
On Sale Date: October 28, 1969 Newsstand Date October 28, 1969
Source: House Ad, Green Lantern #73, Page 21

Newsstand Date October 28, 1969
Source: Comic Reader, #75

Newsstand Date October 28, 1969
Source: Newsdealer Magazine, V24 #9

Copyright Date October 28, 1969
Source: Library of Congress, Periodicals 1969

Frequency: Monthly, (with the exception of Jan., Apr., July, and Oct. (semi-monthly, Nov.)
Cover Price: $0.15
Page Count: 32
Editor: Julius Schwartz

Title: "Snapper Carr -- Super-Traitor"
Pages: 23

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

Writer: Dennis J. O'Neil
Penciller: Dick Dillin
Inker: Joe Giella

Reprinted In:
Justice League of America Archives Vol. 9 HC (2005)
JLA:The Greatest Stories Ever Told TPB (2006)
Showcase Presents:Justice League of America Vol. 4 TPB (2009)
Justice League of America:The Bronze Age Omnibus Vol. 1 HC (2017)
Joker:The Bronze Age Omnibus HC (2019)
Justice League of America:The Last Survivors of Earth TPB (2019)
Justice League of America:A Celebration of 60 Years HC (2020)

Feature Character(s)

• Justice League of America (last appearance in Justice League of America #75; next appearance in Teen Titans #25)
• Superman (last appearance in Superman's Pal Jimmy Olsen #125; next appearance in Action Comics #383)
• Batman (last appearance in Brave & the Bold #87; next appearance in Action Comics #384)
• Flash (last appearance in Flash #193; next appearance in Teen Titans #25)
• Green Lantern (last appearance in Green Lantern #74; next appearance in Teen Titans #25)
• Green Arrow (last appearance in Justice League of America #75; next appearance in Teen Titans #25)
• Atom (last appearance in Justice League of America #75; next appearance in Justice League of America #78)
• Black Canary (last appearance in Justice League of America #75; next appearance in Justice League of America #78)

Supporting Character(s)

• Snapper Carr (last appearance in Justice League of America #66; next appearance in Justice League of America #100)

Villain(s)

• Joker (disguised as John Dough; last appearance in Superman's Pal Jimmy Olsen #125; next appearance in Batman #251)
• John Dough's followers (no further appearances)

Synopsis:
Snapper Carr becomes a pawn of John Dough, aka "Mr. Average", know as "the most normal man in America", and his campaign to turn the public against the Justice League.

Capturing Batman with Snapper's help, Dough takes the Caped Crusader's place and infiltrates the Secret Sanctuary. He then uses a secret ray-projector to affect the emotions of the crowd at a rally, and the actions of the League members. When Batman escapes his death-trap, however, Dough's schemes are exposed, and his true identity as the Joker is revealed.