Comic Title: Action Comics #294
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: November 1962
On Sale Date: September 27, 1962 Newsstand Date September 27, 1962
Source: House Ad, Superman #157, Page 20

Copyright Date September 27, 1962
Source: Library of Congress, Periodicals 1962

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

Title: "The Mutiny of Super-Horse"
Pages: 11

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

Writer: Leo Dorfman
Artist: Jim Mooney

Reprinted In:
Showcase Presents Supergirl Vol. 2 TPB (2009)
Supergirl:The Silver Age Omnibus Vol. 1 HC (2016)
Supergirl:The Silver Age Vol. 2 TPB (2018)

Feature Character(s)

• Supergirl (last appearance in Superman #157; next appearance in Action Comics #295)

Supporting Character(s)

• Comet (last appearance in Action Comics #293; next appearance in Action Comics #300)
• Fred Danvers (last appearance in Action Comics #293; next appearance in Action Comics #295)
• Edna Danvers (last appearance in Action Comics #293; next appearance in Action Comics #295)

Guest Appearance(s)

• Superman (last appearance in Action Comics #294; next appearance in World's Finest Comics #129)

Other Character(s)

• Liz Gaynor (an actress; next appearance in Action Comics #300)
• A movie director and crew (no further appearances)

Cameo Appearance(s)

• Circe (in flashback to Comet’s origin)
• Matt Carver (in flashback to the second story of Action Comics #293)

Synopsis:
Supergirl visits the set of a movie starring Liz Gaynor and Comet, the Super-Horse. Supergirl uses her powers to perform the special effects for the movie, which allow Comet to appear super. Only Comet and Supergirl know that Comet possesses powers of his own. The Girl of Steel begins getting jealous of Liz because the actress is becoming friendly with Comet. The Super-Horse then eats a rare lotus flower which causes him to lose his memory and powers. Liz buys Comet from the studio animal trainer, and Supergirl is heartbroken over the loss of Comet.