Comic Title: Action Comics #339
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: July 1966
On Sale Date: May 26, 1966 Newsstand Date May 26, 1966
Source: Direct Currents, Adventures of Jerry Lewis #95, Page 10

Newsstand Date May 26, 1966
Source: Newsdealer Magazine, V21 #3

Copyright Date May 26, 1966
Source: Library of Congress, Periodicals 1966

Frequency: Monthly (semi-monthly, March)
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "Muto Versus the Man of Tomorrow"
Pages: 12

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

Writer: Edmond Hamilton
Penciller: Curt Swan
Inker: George Klein

Reprinted In:
Superman #248 (1972)
Superman:Past and Future TPB (2009)

Feature Character(s)

• Superman (no appearance)

Guest Star(s)

• Superman of 2966 (last appearance in Action Comics #338; next appearance in World's Finest Comics #166)

Supporting Character(s)

• Jay Senohl (called Jay L-3388 in this story; last appearance in Action Comics #338; no further appearances)
• Lyra 3916 (last appearance in Action Comics #338; no further appearances)

Villain(s)

• Muto (last appearance in Action Comics #338; next appearance in World's Finest Comics #166)
• Von-Don (last appearance in Action Comics #338; no further appearances)

Other Character(s)

• Three android children (last appearance in Action Comics #338; no further appearances)
• Various Atlanteans (no further appearances)

Comments:
Superman does not appear in this story which features his descendant from the year 2966.

Later reprintings of this story place the time as 2496 rather than 2966, presumedly to avoid conflicts with the Legion of Super-Heroes who exist in 2966.

This is the third in a series of Superman of 2965 tales. This story is continued from the first story of Action Comics #338.

Synopsis:
The Superman of 2966 escapes a water trap set for him by Muto with the help of three android children. He then helps the Atlanteans to defeat one of Muto's lieutenants who threatens Atlantis. Muto then uses a growth ray to enlarge the people of Metropolis to gigantic height. Superman restores them to normal before his confrontation with Muto. Having deduced Muto's weakness, Superman is able to open a space-warp capable of sending Muto back to his home dimension. Superman hopes that the villain never returns.