Comic Title: Superman #155
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: August 1962
On Sale Date: June 21, 1962 Copyright Date June 21, 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 Downfall of Superman"
Pages: 8

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

Penciller: Curt Swan
Inker: George Klein

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

Feature Character(s)

• Superman (last appearance in Superman #155; next appearance in Superman's Girl Friend, Lois Lane #35)

Guest Star(s)

• Cosmic Man (disguised as Hercules in this story; last appearance in Action Comics #289; next appearance in Adventure Comics #354)
• Lightning Man (disguised as Samson in this story; last appearance in Action Comics #289; next appearance in Adventure Comics #354)

Supporting Character(s)

• Lois Lane (last appearance in Action Comics #290; next appearance in Superman's Girl Friend, Lois Lane #35)
• Jimmy Olsen (last appearance in Justice League of America #13; next appearance in Superman's Girl Friend, Lois Lane #35)
• Krypto (disguised as Mr. Mxyzptlk in this story; last appearance in Action Comics #290; next appearance in Superman #156)

Villain(s)

• Duke Marple and his men (gangsters; no further appearances)

Other Character(s)

• Antonino Rocca (a famous wrestler; disguised as Superman in this story; no further appearances)
• A group of news photographers (no further appearances)
• An unnamed wrestling referee (no further appearances)

Comments:
Cosmic Man and Lightning Man use armband devices to time-travel in this story only.

Synopsis:
When Superman stages a wrestling exhibition for charity with famed wrestler Antonino Rocca, Mr. Mxyzptlk appears and gives Rocca greater strength than the Man of Steel, enabling him to defeat not only Superman, but also Hercules and Samson, whom Mxyzptlk summons from the distant past.

Witnessing this, gangster Duke Marple forces Rocca to use his new-found might to retrieve Marple’s hidden loot which had been sealed in a cave by an avalanche. When Marple then attempts to murder the wrestler, he is astonished to find that Rocca is invulnerable to his bullets. Then Superman, Samson, and Hercules arrive on the scene and prevent the crooks’ getaway, using powers of electricity and magnetism.

The enitre scenario had been arranged by Superman in order to discover the hiding place of Marple’s loot. Superman and Rocca had exchanged identities to make it seem that Rocca had super-strength, while Cosmic Man and Lightning Man of the Adult Legion of Super-Heroes had posed as Hercules and Samson, and the phony Mr. Mxyzptlk had actually been Superman’s pet, Krypto, his voice supplied by his master’s super-ventriloquism.