Comic Title: DC Comics Presents #35
Publisher: DC (DC Comics Inc.)
Address: 75 Rockefeller Plaza, New York, NY
Cover Date: July 1981
On Sale Date: April 9, 1981 Newsstand Date April 9, 1981
Source: Comic Reader, #190

Newsstand Date April 9, 1981
Source: Comics Journal, #63

Copyright Date April 9, 1981
Source: Library of Congress, Copyright Office 1981

Newsstand Date April 6, 1981
Source: Daily Planet, Vol. 81 #4
Listed as on sale the week of April 6th

Frequency: Monthly
Cover Price: $0.50
Page Count: 36
Editor: Julius Schwartz

Title: "Whatever Happened to Rex the Wonder Dog"
Pages: 8

Feature(s):
Rex the Wonder Dog (of Earth-1)

Writer: Mike Tiefenbacher
Artist: Gil Kane
Letterer: Gaspar Saladino
Colorist: Anthony Tollin

Feature Character(s)

• Rex the Wonder Dog (last appearance in Adventures of Rex, the Wonder Dog #46; no further appearances)

Guest Star(s)

• Detective Chimp (last appearance in Adventures of Rex, the Wonder Dog #46; next appearance in Crisis on Infinite Earths #11)

Supporting Character(s)

• Danny Dennis (last appearance in Adventures of Rex, the Wonder Dog #46; no further appearances)

Villain(s)

• Two box office bandits (no further appearances)

Guest Appearance(s)

• Sheriff Edward Chase (last name misspelled Case in this story; last appearance in Adventures of Rex, the Wonder Dog #46; no further appearances)

Other Character(s)

• An unnamed doctor (no further appearances)

Synopsis:
Bobo, the Detective Chimp, is a fan of Rex the Wonder Dog. When his idol comes to town to perform in a circus event, Bobo sees the show. After meeting Rex backstage, both animals begin following the trail of two box office thieves. They stow away on the crooks' boat and are taken to a small island.

Rex and Bobo attempt to follow the crooks across the island, but Rex is slowed due to his advanced age. After defending himself from a crocodile, Rex is forced to rest. Bobo brings him water from a spring. The water rejuvenates Rex.

With renewed energy Bobo and Rex defeat the crooks and return with them to the mainland. Later examination reveals that both animals have had their youth restored. Inadvertently, the spring Bobo discovered was really the Fountain of Youth.

As time passes, the rejuvenated Rex joins the space program with his master Lt. Col. Danny Dennis. He then becomes the first dog on the moon.