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#20
Challengers of the Unknown, #19

Published: April-May 1961

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Issue Contents:
The Beasts from the Fabulous Gem!

Story Featuring Challengers of the Unknown

Credits
The Alien Who Stole a Planet

Story Featuring Challengers of the Unknown

Credits
The Beasts from the Fabulous Gem

Story Featuring Challengers of the Unknown

Credits

Story Featuring Science Shorts

"Phooey! I never like to use oil on my hair!"

Credits
Animal Time-Sense
Credits
Story Notes

On the page before page 8 of the previous story sequence. Reprints only the top half of the original feature.

A Salute to Our American Indians!
Credits
Story Notes

Appears on the page immediately following page 7 of the previous story sequence.

Captive of the Criminal Brain

Story Featuring Doctor Rocket

"Let's go! This is a television camera."

Credits
The Sea Beasts from One Million B.C.!
Storyline

House ad for Showcase (DC, 1956 series) #31 (March-April 1961).

Characters
Other
Credits
Your Passport to Amazing Adventures!
Storyline

House ad for current issues of House of Mystery, Tales of the Unexpected, and My Greatest Adventure.

Characters
Other
Credits

Ad Featuring American Seeds

Story Notes

Back cover.

Ad Featuring Jowett Institute of Physical Training

Story Notes

Inside back cover.

Ad Featuring Stephens Credit Sales Mottoes

Ad Featuring Grit Newspaper

Story Notes

Ad from Grit Publishing Co. On the page before page 8 of the previous story sequence.

Ad Featuring Honor House Products Novelties

Story Notes

Sold by Honor House Products. Inside front cover.