Comic Title: Challengers of the Unknown #52
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Oct/Nov 1966
On Sale Date: August 4, 1966 Newsstand Date August 4, 1966
Source: House Ad, Action Comics #341, Page 15

Copyright Date August 4, 1966
Source: Library of Congress, Periodicals 1966

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

Title: "Two Are Dead -- Two to Go"
Pages: 23

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

Writer: France E. Herron
Artist: Bob Brown

Feature Character(s)

• Challengers of the Unknown (last appearance in Challengers of the Unknown #51; next appearance in Challengers of the Unknown #53)
• Ace Morgan (last appearance in Challengers of the Unknown #51; next appearance in Challengers of the Unknown #53)
• Rocky Davis (last appearance in Challengers of the Unknown #51; next appearance in Challengers of the Unknown #53)
• Red Ryan (last appearance in Challengers of the Unknown #51; next appearance in Challengers of the Unknown #53)
• Prof. Haley (last appearance in Challengers of the Unknown #51; next appearance in Challengers of the Unknown #53)

Villain(s)

• Villo (last appearance in Challengers of the Unknown #50; next appearance in Challengers of the Unknown #54)
• Brainex (last appearance in Challengers of the Unknown #50; next appearance in Challengers of the Unknown #54)
• The Brutals (Mongolian hillsmen; no further appearances)

Synopsis:
The Challengers meet a group of giant Mongolian hillsmen known as the Brutals. The Challs are able to defeat the giants by ringing a gong which breaks the magic spell responsible for their transformation. The Challs suspect Villo is responible for the transformation.

The Challengers track down Villo and Brainex in their mobile headquarters. The villains use giant duplicates of the Challs to delay the team, while they make a getaway. When the giants are defeated, the Challs discover that Ace is dead.

Seeking revenge, the remaining Challs follow Villo underwater where his headquarters now resides. Rocky succumbs to the raptures of the deep and imagines that Red is a sea serpent. Rocky then strangles Red to death. Prof snaps Rocky out of his condition, but Rocky is haunted by his actions.

Rocky then pretends to go crazy and kill Prof, so that Villo will allow him inside his headquarters. Rocky then captures Villo, while Prof brings their dead friends inside. Prof uses Brainex to send the team back in time before the deaths of his teammates. Once back in time, the Challs are alive again to hunt down Villo.