Comic Title: Superman #154
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: July 1962
On Sale Date: May 8, 1962 Copyright Date May 8, 1962
Source: Library of Congress, Periodicals 1962

Frequency: Monthly, with the exception of March, June, Sept. and Dec.
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Underwater Pranks of Mr. Mxyzptlk"
Pages: 13

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

Writer: Edmond Hamilton
Penciller: Curt Swan
Inker: George Klein

Reprinted In:
Showcase Presents Superman Vol. 3 TPB (2007)

Feature Character(s)

• Superman (last appearance in Justice League of America #12; next appearance in Superman #154)

Supporting Character(s)

• Lois Lane (last appearance in Action Comics #289; next appearance in Superman #154)
• Perry White (last appearance in Action Comics #289; next appearance in Superman #154)
• Lori Lemaris (last appearance in Superman's Girl Friend, Lois Lane #33; next appearance in Superman #154)
• Krypto (last appearance in Action Comics #288; next appearance in Action Comics #290)
• Jimmy Olsen (last appearance in Action Comics #289; next appearance in Superman #154)

Villain(s)

• Mr. Mxyzptlk (last appearance in World's Finest Comics #123; next appearance in Action Comics #291)

Guest Appearance(s)

• Streaky (last appearance in Action Comics #287; next appearance in Action Comics #292)

Other Character(s)

• Citizens of the 5th dimension and several citizens of Metropolis (no further appearances)

Synopsis:
Mxyzptlk returns to plague Superman in an attempt to win the Brxll award for practical jokes from his home dimension. To prevent Superman from tricking him into saying his name backwards, the imp stays underwater where he cannot speak. Then he proceeds to play magical pranks on Metropolis. First he has planes make water landings and ships land on airstrips, then he causes the adults of Metropolis to act like children, finally he causes animals to speak.

Superman tries to stop the imp, but Mxyzptlk’s plan to remain underwater prevents the Man of Steel from succeeding. Finally Superman gives up and goes to the moon. Mxyzptlk follows him. Since there is no air, the imp cannot speak, but Superman creates an air pocket and tricks Mxyzptlk into returning home for another 90 days.