Comic Title: Adventures of Rex, the Wonder Dog #27
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: May/Jun 1956
Approx. On Sale Date: March 1, 1956 Copyright Date February 28, 1956
Source: Library of Congress, Periodicals 1956
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: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Julius Schwartz

Title: "Mystery of the Midget Sub"
Pages: 10

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

Writer: Robert Kanigher
Penciller: Gil Kane
Inker: Bernard Sachs

Feature Character(s)

• Rex the Wonder Dog (last appearance in Adventures of Rex, the Wonder Dog #26; next appearance in Adventures of Rex, the Wonder Dog #27)

Supporting Character(s)

• Danny Dennis (last appearance in Adventures of Rex, the Wonder Dog #26; next appearance in Adventures of Rex, the Wonder Dog #27)
• Major Dennis (last appearance in Adventures of Rex, the Wonder Dog #26; next appearance in Adventures of Rex, the Wonder Dog #29)

Villain(s)

• Two sea pirates (no further appearances)

Synopsis:
Danny's father is sent to sea to perform some underwater tests. When the Major doesn't return from a dive, Danny and Rex go after him. Rex protects Danny from several undersea dangers. They then find a trail of pearls leading to a sunken ship. Danny sees a midget submarines surfacing. Onboard the Major is held captive, after discovering a criminal operation to steal the pearls. Rex disarms the crooks and rescues the Major.