Comic Title: Challengers of the Unknown #60
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Feb/Mar 1968
On Sale Date: December 7, 1967 Newsstand Date December 7, 1967
Source: Direct Currents, Batman #199, Page 14

Copyright Date December 7, 1967
Source: Library of Congress, Periodicals 1967

Newsstand Date December 7, 1967
Source: Newsdealer Magazine, V22 #11

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

Title: "The Thing That Could Not Die"
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 #59; next appearance in Challengers of the Unknown #61)
• Ace Morgan (last appearance in Challengers of the Unknown #59; next appearance in Challengers of the Unknown #61)
• Rocky Davis (last appearance in Challengers of the Unknown #59; next appearance in Challengers of the Unknown #61)
• Prof. Haley (last appearance in Challengers of the Unknown #59; next appearance in Challengers of the Unknown #61)

Supporting Character(s)

• Tino Manarry (last appearance in Challengers of the Unknown #59; next appearance in Challengers of the Unknown #63)

Villain(s)

• Red Ryan (identity as Seekeenakee revealed; last appearance in Challengers of the Unknown #59; next appearance in Challengers of the Unknown #61)
• Multi-Man (last appearance in Challengers of the Unknown #61; next appearance in Super-Team Family #10)
• Kra (last appearance in Challengers of the Unknown #61; next appearance in Super-Team Family #10)
• The Volcano Man (last appearance in Challengers of the Unknown #61; next appearance in Super-Team Family #10)
• League of Challenger-Haters (last appearance in Challengers of the Unknown #61; next appearance in Super-Team Family #10)

Other Character(s)

• Mr. Morton (a nitrox manufacturer; no further appearances)

Comments:
This story is continued in part from Challengers of the Unknown #59.

Red Ryan is restored to life in this story after temporarily becoming the villain Seekeenakee.

Synopsis:
When the Challengers attempt to find Seekeenakee, they are attacked by a lizard man. As the fight concludes, the lizard man changes into a phoenix and flies away. The Challs then realize that Seekeenakee is a shapeshifter.

The Challengers return to the headquarters to check on Multi-Man whom they initially believe is Seekeenakee. The villain is still in his cell next to Kra and the Volcano Man, so the Challs question him. They learn that Multi-Man gave his formula to another man, so they focus on finding the formula components to track down their foe. Multi-Man however does not tell the team who the man he was.

The heroes visit a frozen nitrox manufacturer and soon encounter Seekeenakee. Prof concocts an antidote and uses it on his foe. Seekeenakee changes back to human form, and the Challs learn that he is a mentally deranged Red Ryan. After a long battle, Red is restored to normal and rejoins the team.