Comic Title: World's Finest Comics #2
Publisher: DC (World's Best Comics Company)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Summer 1941
On Sale Date: May 16, 1941 Newsstand Date May 16, 1941
Source: House Ad, Action Comics #37, Page 64,
More Fun Comics #68, Page 64,
Detective Comics #52, Page 64,
Adventure Comics #63, Page 64,
Superman #11, Page 63

Copyright Date May 7, 1941
Source: Library of Congress, Periodicals 1941
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Quarterly
Cover Price: $0.15
Page Count: 96
Editor: Fredric Whitney Ellsworth

Title: "The Unknown X"
Pages: 13

Feature(s):
Superman (of Earth-2)

Writer: Jerry Siegel
Penciller: Paul Cassidy
Inker: Leo Nowak

Reprinted In:
Superman:The World's Finest Comics Archives Vol. 1 HC (2004)
Superman Chronicles Vol. 6 TPB (2009)
Superman:The Golden Age Omnibus Vol. 2 HC (2016)
Superman:The Golden Age Vol. 3 TPB (2017)

Feature Character(s)

• Superman (last appearance in Superman #11; next appearance in Action Comics #38)

Supporting Character(s)

• Lois Lane (last appearance in Superman #11; next appearance in Action Comics #38)
• Perry White (last appearance in Superman #11; next appearance in Action Comics #38)
• Sergeant Casey (last appearance in Superman #11; next appearance in Action Comics #38)

Villain(s)

• Arthur Jameson and his gang (Benjie named; no further appearances)

Other Character(s)

• Russell Walker (a millionaire; no further appearances)

Synopsis:
Metropolis is gripped by a crime wave under the direction of the Unknown X, a mysterious gang leader. Superman apprehends several members of the gang, but he is unable to make them talk. He is finally able to get a lead on the gang boss, when he allows one of the crooks to escape. The crook makes a call the Arthur Jameson, head of a citizens' committee put together to fight the crooks.

Superman begins investigating Jameson as Clark Kent. Jameson claims that he is trying to infiltrate the gang to learn the identity of the Unknown X. Later he receives a threat and tries to leave town, suggesting that Clark do the same. Superman follows Jameson and proves that he is really the gang boss. Jameson holds millionaire Russell Walker hostage, but his plan fails to stop Superman, who brings the crime boss to justice.