Comic Title: Action Comics #388
Publisher: DC (National Periodical Publications, Inc.)
Address: 909 Third Avenue, New York, NY
Cover Date: May 1970
On Sale Date: March 26, 1970 Newsstand Date March 26, 1970
Source: House Ad, Batman #221, Page 29

Newsstand Date March 26, 1970
Source: Comic Reader, #77

Copyright Date March 26, 1970
Source: Library of Congress, Periodicals 1970

Frequency: Monthly
Cover Price: $0.15
Page Count: 32
Editor: Mort Weisinger

Title: "The Puzzle of the Wild World"
Pages: 14

Feature(s):
Superman (of Earth-1)

Writer: Cary Bates
Penciller: Curt Swan
Inker: George Roussos
Letterer: John Costanza

Feature Character(s)

• Superman (last appearance in Superman's Girl Friend Lois Lane #101; next appearance in Adventure Comics #393)

Guest Appearance(s)

• Superman from a duplicate Earth (no further appearances)
• Lois Lane, Jimmy Olsen and Perry White from a duplicate Earth (no further appearances)
• Lex Luthor, Brainiac, Bizarro, and Mr. Mxyzptlk from a duplicate Earth (no further appearances)
• Supergirl, Krypto, Batman, and Wonder Woman from a duplicate Earth (no further appearances)
• Sgt. Rock, Little Half Shot, and Ice-Bag Soldier from a duplicate Earth (no further appearances)
• Legion of Super-Heroes from a duplicate Earth (Saturn Girl, Lightning Lad, and Cosmic Boy; no further appearances)

Other Character(s)

• Farlow Nurd (inventor of a world duplicator; no further appearances)
• Three astronauts (Mike and Steve named; no further appearances)
• Various inhabitants from a duplicate Earth (no further appearances)

Cameo Appearance(s)

• Justice League from a duplicate Earth (Aquaman, Flash, and Green Lantern; appear on splash page only)

Synopsis:
Superman returns to Earth from a space mission to find a world that he barely recognizes. He has apparently revealed his secret identity to the world and is scheduled to marry Lois. Clark Kent is present. His greatest villains including Luthor, Brainiac, and Bizarro deliver wedding presents. Meanwhile, Sgt. Rock is trying to kill him with chocolate syrup and brussels sprouts.

Eventually scientist Farlow Nurd comes forward to explain. He created a world duplicator which created another Earth, while the real Earth was shifted to a limbo-realm. With Nurd's help, Superman is able to reverse the effects of the duplicator and return the real Earth to its rightful place in the universe. The duplicate Earth remains in existence. The Superman of that world then marries Lois.