Comic Title: Action Comics #273
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1961
On Sale Date: December 29, 1960 Newsstand Date December 29, 1960
Source: House Ad, Superman's Girl Friend Lois Lane #23, Page 21

Newsstand Date December 29, 1960
Source: Newsdealer Magazine, V15 #10

Copyright Date December 29, 1960
Source: Library of Congress, Periodicals 1961

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Circulation: 458000
Editor: Mort Weisinger

Title: "The World of Mr. Mxyzptlk"
Pages: 10

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

Writer: Jerry Siegel
Artist: Al Plastino

Reprinted In:
Superman #218 (1969)
Showcase Presents Superman Vol. 2 TPB (2006)

Feature Character(s)

• Superman (last appearance in Superman's Girl Friend, Lois Lane #23; next appearance in Superman's Pal, Jimmy Olsen #51)

Villain(s)

• Mr. Mxyzptlk (last appearance in World's Finest Comics #113; next appearance in Superman's Pal, Jimmy Olsen #52)

Other Character(s)

• Citizens of the 5th dimension, a Jimmy Olsen robot, several orphans from the Smallville Orphanage, and orphanage headmaster (no further appearances)

Synopsis:
Mr. Mxyzptlk returns to plague Superman who is late for a performance at the Smallville orphanage. Superman gets the imp to say his name backwards, sending him home, but the delay forces him to cancel his performance.

Superman then enters Mxyzptlk’s 5th dimensional world and begins pulling pranks on Mxyzptlk who is running for Mayor. The pranks sabotage Mxyzptlk’s campaign, angering the imp. Mxyzptlk tries to trick Superman into saying his name backwards. When he is finally successful at getting the Man of Steel to say "Namrepus", Superman does not return home.

When it is announced that Mxyzptlk has lost the election, Superman says "Le-Lak", which is Kal-El, his true name backwards. This returns him to Earth, but Mxyzptlk, who did not hear Superman say his name, is left confused.