Comic Title: Action Comics #299
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: April 1963
On Sale Date: February 28, 1963 Newsstand Date February 28, 1963
Source: House Ad, Sugar and Spike #46, Page 30

Copyright Date February 28, 1963
Source: Library of Congress, Periodicals 1963

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Mort Weisinger

Title: "The Story of Superman's Experimental Robots"
Pages: 13

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

Writer: Jerry Siegel
Artist: Al Plastino

Reprinted In:
Showcase Presents Superman Vol. 4 TPB (2008)

Feature Character(s)

• Superman (last appearance in Superman's Pal, Jimmy Olsen #36; next appearance in Superman #176)

Villain(s)

• Various alien attackers (no further appearances)

Other Character(s)

• LL-35, M-26, and WK-10 (three Superman robots; destroyed in this story; no further appearances)
• Natives of the planet Tharrl and several explorers from ancient Atlantis (no further appearances)

Cameo Appearance(s)

• Lois Lane (in Superman’s thoughts)
• Lana Lang (in Superman’s thoughts)
• Lori Lemaris (in Superman’s thoughts)
• Lightning Lad (in Superman’s thoughts)

Comments:
This is an "Untold Tale" and takes place at some point in Superman’s past.

Synopsis:
Superman creates two new robots with special abilities with the guidance of robot LL-35, a gift from the planet Jax. He takes the robots to the planet Tharrl for training, but an alien force-shield alters the robots’ programming, causing them to attack Superman. The Man of Steel is tortured by the rogue robots, while observing the effects of a strange Tharrl clock on the planet. Eventually, the clock causes a rainstorm that destroys all the robots and frees Superman. The Man of Steel investigates and learns that the clock was created by ancient Atlanteans. Coincidentally, the hands on the clock formed the initials "LL" when they created the rainstorm which liberated Superman.