Comic Title: Adventure Comics #210
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: March 1955
Approx. On Sale Date: January 27, 1955 Copyright Date January 25, 1955
Source: Library of Congress, Periodicals 1955
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

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

Title: "The Super-Dog from Krypton"
Pages: 10

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

Writer: Otto Binder
Penciller: Curt Swan
Inker: John Fischetti

Reprinted In:
Superboy #165 (1970)
DC Special Blue Ribbon Digest #9 (1981)
Superman in the Fifties TPB (2002)
Superboy:A Celebration of 75 Years HC (2020)
Superman in the Fifties TPB (2021)
Tails of the Super-Pets TPB (2022)

Feature Character(s)

• Superboy (last appearance in Superboy #39; next appearance in Superboy #40)

Supporting Character(s)

• Krypto (first appearance; last appearance in Superman's Pal, Jimmy Olsen #101; next appearance in Adventure Comics #214)
• Jonathan Kent (last appearance in Superboy #38; next appearance in Superboy #40)
• Lana Lang (last appearance in Superboy #39; next appearance in Superboy #40)
• Jor-El (in flashback; last appearance in Superman's Pal, Jimmy Olsen #101; next appearance in World's Finest Comics #146)
• Lara (in flashback; last appearance in Superman's Pal, Jimmy Olsen #101; next appearance in World's Finest Comics #146)

Villain(s)

• A gang of crooks (no further appearances)

Other Character(s)

• A Smallville dog catcher (no further appearances)

Comments:
This story introduces Krypto, Superboy's dog.

A flashback which occurs chronologically between scene 1 (page 1 - page 3, panel 2) and scene 2 (page 3, panels 3-4) of More Fun Comics #101 reveals how Krypto was sent into space and later arrives on Earth.

Synopsis:
Superboy encounters a super powered dog on the streets of Smallville. The dog seems to recognize him and is friendly. Superboy follows the dog to a rocket that has recently crashed on Earth. Inside the rocket he finds papers which reveal that the dog came from Krypton. The dog was sent into space by Jor-El to test a rocket which was deflected by a meteor. The dog, Krypto, belonged to Kal-El as a baby. Krypto's ship eventually made its way to Earth.

Superboy is thrilled to have his dog back. However, Krypto's frisky nature and super powers cause several problems for Superboy including threatening his secret identity. Superboy constructs a super doghouse for Krypto, but the dog is easily able to free himself.

Eventually Krypto takes off into space to chase meteors. Superboy is happy that he won't have to deal with Krypto's antics anymore, but he is sad that his friend is gone.