Comic Title: Flash #139
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: September 1963
On Sale Date: July 18, 1963 Copyright Date July 18, 1963
Source: Library of Congress, Periodicals 1963

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

Title: "Menace of the Reverse-Flash"
Pages: 25

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

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

Reprinted In:
Flash #205 (1971)
Showcase Presents:The Flash Vol. 2 TPB (2008)
Flash Archives Vol. 5 HC (2009)
DC Comics Presents:The Flash #1 (2011)
Flash:The Silver Age Omnibus Vol. 2 HC (2017)
Flash:The Silver Age Vol. 3 TPB (2018)
Flash Rogues:Reverse-Flash TPB (2019)

Feature Character(s)

• Flash (last appearance in Justice League of America #22; next appearance in Justice League of America #23)

Supporting Character(s)

• Iris West (last appearance in Flash #138; next appearance in Flash #140)

Villain(s)

• Reverse-Flash (Professor Zoom; first appearance; next appearance in Flash #147)

Other Character(s)

• Dr. Walter Drake (no further appearances)

Synopsis:
A time capsule is sent into the future by Dr. Walter Drake. The capsule contains an atomic clock, a spare Flash uniform, and some other items. Dr. Drake realizes that the method with which he propelled the capsule through time changed the atomic clock into a bomb. He enlists the Flash to help him prevent a disaster.

In the year 2463, a criminal known as the Professor finds the capsule and takes the Flash uniform. Using future science, he is able to enable the costume to give him super-speed. He begins a crime wave as Professor Zoom.

Flash arrives in the future and begins his search for the atomic clock. He learns about Zoom and confronts him. The two speedsters are evenly matched and battle to a stalemate. Flash learns that the aura protecting him from friction was duplicated by Zoom using chemicals. He manages to force a break down of the chemicals which eliminates Zoom’s aura. Without this protection, Zoom is defeated and turned over to the authorities.

Flash locates the atomic clock and safely disposes of it. He then returns to the present and informs Dr. Drake that the bomb was destroyed. He also destroys the costume of Professor Zoom.