Comic Title: Flash #158
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: February 1966
On Sale Date: December 2, 1965 Copyright Date December 2, 1965
Source: Library of Congress, Periodicals 1965

Frequency: Monthly, with the exception of Jan., July & Oct.
Cover Price: $0.12
Page Count: 32
Editor: Julius Schwartz

Title: "The One-Man Justice League"
Pages: 10

Feature(s):
Flash (Barry Allen of Earth-1)

Writer: John Broome
Penciller: Carmine Infantino
Inker: Joe Giella

Reprinted In:
Justice League of America #92 (1971)
DC Special Blue Ribbon Digest #2 (1980)
Showcase Presents:The Flash Vol. 3 TPB (2009)
Flash:The Silver Age Omnibus Vol. 2 HC (2017)
Flash:The Silver Age Vol. 4 TPB (2019)

Feature Character(s)

• Flash (last appearance in Flash #158; next appearance in Justice League of America #42)

Villain(s)

• Professor Ivo (last appearance in Brave and the Bold #30; next appearance in Action Comics #480)
• The Land-Sea-Air Gang (no further appearances)

Guest Appearance(s)

• Justice League of America (last appearance in Justice League of America #41; next appearance in Justice League of America #42)
• Hal Jordan (last appearance in Green Lantern #42; next appearance in Justice League of America #42)
• Carter Hall (last appearance in Justice League of America #41; next appearance in Hawkman #12)
• Aquaman (last appearance in Teen Titans #1; next appearance in Aquaman #26)
• Ray Palmer (last appearance in Atom #23; next appearance in Justice League of America #42)

Cameo Appearance(s)

• Superman (as a model)

Comments:
The Justice League appears only briefly in this story.

Synopsis:
When the Flash attempts to pursue the Land-Sea-Air Gang he discovers that his costume has been replaced by Green Lantern's. Flash also learns that he no longer has super-speed, but he does have GL's powers. As Green Lantern, Flash brings down half the gang, then mysteriously finds himself transformed into Hawkman. The crooks manage to overpower him and escape.

Flash's transformations have been caused by Professor Ivo, who is secretly operating in a Central City laboratory. Ivo has devised a way to transfer the powers of the Justice League to himself. However, an anomaly caused by Flash's protective aura causes him to be the recipient of the powers too.

When Flash recovers from unconsciousness, he has become Aquaman. He continues to pursue the crooks and overtakes their escape boat. The crooks shoot at him as another transformation causes him to become the Atom.

The crooks begin to get the upper hand, when Ivo switches his machine to focus on Superman. The Man of Steel's invulnerability protects him and overloads Ivo's machine. Ivo's lab explodes, ending the experiment. Flash returns to normal and defeats the gang with his own powers. Flash does not learn the cause behind his strange transformations. The other Justice Leaguers were not using their powers when Ivo targeted them, so they didn't even notice.