The Flash #123

The Flash Vol. 1 #123 (1961)

• The "Mega Key": This is the legendary "Flash of Two Worlds" issue.
• Historical Significance:* This issue introduced the DC Multiverse and "Earth-2."
  • It features the first meeting of the Silver Age Flash (Barry Allen) and the Golden Age Flash (Jay Garrick).
  • It established that the Golden Age heroes of the 1940s existed on a parallel Earth, allowing DC to bring back retired characters.
• Synopsis:* "Flash of Two Worlds!": While performing a magic trick for a charity event, Barry Allen vibrates his molecules at a specific frequency and accidentally transports himself to a parallel dimension. He finds himself in "Earth-2" and tracks down his childhood comic book idol: Jay Garrick.
  • The two speedsters team up to take down a trio of Jay’s classic villains—The Fiddler, The Shade, and The Thinker—who have come out of retirement. After the victory, Barry vibrates back to his own Earth (Earth-1), promising to return.