Comic Title: Superman #169
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: May 1964
On Sale Date: March 19, 1964 Newsstand Date March 19, 1964
Source: House Ad, Superman's Girl Friend Lois Lane #49, Page 30

Copyright Date March 19, 1964
Source: Library of Congress, Periodicals 1964

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

Title: "The Infernal Imp"
Pages: 8

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

Writer: Jerry Siegel
Penciller: Curt Swan
Inker: George Klein

Reprinted In:
Superman Family #168 (1974)

Feature Character(s)

• Superman (last appearance in World's Finest Comics #141; next appearance in Superman #169)

Supporting Character(s)

• Jimmy Olsen (last appearance in World's Finest Comics #141; next appearance in Superman #169)

Villain(s)

• Mr. Mxyzptlk (last appearance in Superman's Girl Friend, Lois Lane #48; next appearance in Superman #171)

Other Character(s)

• The mayor of the 5th dimension and a doctor (no further appearances)
• A hat shop salesman (no further appearances)

Cameo Appearance(s)

• Cary Grant (on a billboard)

Synopsis:
Mr. Mxyzptlk gets a case of lockjaw after pulling a prank on the mayor of the 5th dimension. The imp is unable to talk, so he returns to Earth to play pranks on Superman. The Man of Steel is unable to trick Mxyzptlk into saying his name backwards, since the imp can't talk. He eventually using a device which uses telepathy to translate thoughts into words. When Mxyzptlk thinks his name backwards, the device verbalizes the words, causing Mxyzpltk to return to his own dimension.