Comic Title: Action Comics #266
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: July 1960
On Sale Date: May 31, 1960 Newsstand Date May 31, 1960
Source: House Ad, Superman's Girl Friend Lois Lane #18, Page 21

Copyright Date May 31, 1960
Source: Library of Congress, Periodicals 1960

Frequency: Monthly
Cover Price: $0.10
Page Count: 32
Editor: Mort Weisinger

Title: "The World's Mightiest Cat"
Pages: 13

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

Writer: Jerry Siegel
Artist: Jim Mooney

Reprinted In:
Supergirl Archives Vol. 1 HC (2001)
Showcase Presents:Supergirl Vol. 1 TPB (2008)
Supergirl:The Silver Age Omnibus Vol. 1 HC (2016)
Supergirl:The Silver Age Vol. 1 TPB (2017)
Tails of the Super-Pets TPB (2022)

Feature Character(s)

• Supergirl (last appearance in Superman's Pal, Jimmy Olsen #46; next appearance in Superman #139)

Supporting Character(s)

• Streaky (last appearance in Action Comics #261; next appearance in Action Comics #271)
• Mr. Dixon (last appearance in Action Comics #263; no further appearances)

Guest Appearance(s)

• Superman (last appearance in Action Comics #266; next appearance in World's Finest Comics #111)
• Krypto (last appearance in Superman's Pal, Jimmy Olsen #45; next appearance in Superman #139)

Other Character(s)

• Paul Dexter (a boy from the orphanage; no further appearances)

Comments:
The origin of Streaky is briefly recapped in this story.

Synopsis:
Superman and Krypto give a performance for the Midvale Orphanage. Superman gives the children miniature capes. One boy, Paul Dexter, puts his cape on Streaky, Linda Lee’s cat. Streaky then plays with a ball of yarn which becomes entangled with the x-kryptonite chunk that gives him super powers.

Streaky flys into the room with Paul. When Paul gets the other children, Streaky’s powers wear off. When the boys arrive they don’t believe Paul. Streaky gains powers again when playing with the yarn. Paul sees him perform super deeds, but Linda, as Supergirl, covers up the effects. Paul is again unable to prove what he has seen.

Supergirl lures Streaky away from the orphanage. Together they recapture some animals which escaped from a safari. Streaky’s powers again wear off. Paul is called a liar by the other children, so Supergirl gets Krypto to help. Krypto convinces the children that Streaky’s deeds were pranks pulled by the super dog which saves Paul’s reputation.