Comic Title: Challengers of the Unknown #58
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Oct/Nov 1967
On Sale Date: August 1, 1967 Newsstand Date August 1, 1967
Source: Direct Currents, Showcase #70, Page 14

Copyright Date August 1, 1967
Source: Library of Congress, Periodicals 1967

Newsstand Date August 1, 1967
Source: Newsdealer Magazine, V22 #6

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Editor: Murray Boltinoff

Title: "Live Till Tomorrow"
Pages: 23

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

Writer: Arnold Drake
Artist: Bob Brown

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #57; next appearance in Challengers of the Unknown #59)
• Ace Morgan (last appearance in Challengers of the Unknown #57; next appearance in Challengers of the Unknown #59)
• Rocky Davis (last appearance in Challengers of the Unknown #57; next appearance in Challengers of the Unknown #59)
• Prof. Haley (last appearance in Challengers of the Unknown #57; next appearance in Challengers of the Unknown #59)

Supporting Character(s)

• Tino Manarry (last appearance in Challengers of the Unknown #57; next appearance in Challengers of the Unknown #59)

Villain(s)

• Neutro (aka Starrett; no further appearances)

Cameo Appearance(s)

• Multi-Man (pictured in Ace's thoughts)
• Kra (pictured in Ace's thoughts)
• Villo (pictured in Ace's thoughts)

Synopsis:
The Challengers returns to their undersea headquarters and are attacked by an unidentified aircraft. The attacker fires a beam that turns their plane into glass. The Challs survive and escape. After a second unsuccessful battle, the Challs manage to force the craft to the ground.

When they land, the Challengers meet the enemy pilot, who calls himself Neutro. Their opponent is radioactive and capable of molecular transformation. With the help of Tino Manarry, the Challs discover that Neutro is trying to gain access to a uranium deposit located under their headquarters. They also learn that Neutro's transformation ray cannot affect organic matter. With this knowledge they are able to defeat and apprehend Neutro.