Comic Title: Challengers of the Unknown #57
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Aug/Sep 1967
On Sale Date: June 1, 1967 Newsstand Date June 1, 1967
Source: Direct Currents, Detective Comics #365, Page 30

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

Newsstand Date June 1, 1967
Source: Newsdealer Magazine, V22 #4

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

Title: "The Kook and the Kilowatt Killer"
Pages: 24

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 #56; next appearance in Challengers of the Unknown #58)
• Ace Morgan (last appearance in Challengers of the Unknown #56; next appearance in Challengers of the Unknown #58)
• Rocky Davis (last appearance in Challengers of the Unknown #56; next appearance in Challengers of the Unknown #58)
• Prof. Haley (last appearance in Challengers of the Unknown #56; next appearance in Challengers of the Unknown #58)

Villain(s)

• Tino Manarry (identity as Martin Ryan revealed; last appearance in Challengers of the Unknown #56; next appearance in Challengers of the Unknown #58)
• Power Man (no further appearances)

Other Character(s)

• Tino's manager (last appearance in Challengers of the Unknown #56; next appearance in Challengers of the Unknown #71)

Synopsis:
The Challengers battle Power Man, a criminal scientist who was granted electrical powers during a cyclotron malfunction. Power Man is able to absorb energy directly from power stations and forces the Challengers to retreat. The battle is caught on film by Tino Manarry who wants to kill the Challengers himself. Tino teams with Power Man to defeat the Challs.

When Tino finally has the Challengers at his mercy, he reveals that he is Red Ryan's brother Martin. He blames them for Red's death. The Challs are able to escape, then deliver proof to Tino that Red sacrificed his life willingly to save others. Tino regrets his attacks on the Challengers and defeats Power Man himself. The team offers membership to Tino, but the kid refuses.