The on sale date is from the publication date as reported to the U.S. Copyright Office in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 40, January-December 1945, Numbers 1-4. Class B periodical. Copyright registration #B 653420.
Character(s):
Superman [Clark Kent]; Lois Lane; Perry White; Mr. Mxyztplk
Synopsis:
When unusual and weird things begin affecting Clark Kent, there is only one answer for it: that imp from another dimension has returned, and that means more headaches for the Man of Tomorrow!