Comic Title: Challengers of the Unknown #17
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Dec/Jan 1960
On Sale Date: October 11, 1960 Copyright Date October 11, 1960
Source: Library of Congress, Periodicals 1960

Newsstand Date October 11, 1960
Source: Newsdealer Magazine, V15 #8

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Secret of the Space Capsules"
Pages: 13

Feature(s):
Challengers of the Unknown (of Earth-1)

Artist: Bob Brown

Reprinted In:
Showcase Presents Challengers of the Unknown Vol. 1 TPB (2006)

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #17; next appearance in Challengers of the Unknown #18)
• Ace Morgan (last appearance in Challengers of the Unknown #17; next appearance in Challengers of the Unknown #18)
• Rocky Davis (last appearance in Challengers of the Unknown #17; next appearance in Challengers of the Unknown #18)
• Red Ryan (last appearance in Challengers of the Unknown #17; next appearance in Challengers of the Unknown #18)
• Prof. Haley (last appearance in Challengers of the Unknown #17; next appearance in Challengers of the Unknown #18)

Villain(s)

• An alien pet and plant creature (no further appearances)

Other Character(s)

• Two dwarf-like aliens and a US Naval team (no further appearances)

Synopsis:
A Navy ship destroys an iceberg which releases four frozen capsules. One of them breaks open releasing a plant menace which begin growing uncontrollably. The Challengers are called in to stop it. Prof is able to finish it off just before it drags the Navy ship underwater.

The Challs track the other capsules to a remote coastline. There, they find a strange corkscrew-nosed creature. They create a firewall which forces the creature to go underground. The Challs are summoned back to the coast to discover two dwarf-like aliens. The aliens explain that they came to Earth during the ice age and were frozen. Earth’s atmosphere is harmful to them and they are dying.

The Challs retrieve the fourth capsule which contains the alien ship. The ship contains tanks filled with the alien atmosphere which revives the aliens. The grateful aliens board their ship and pick up the other creature which has returned. Then they return to their own world.