DC Released February 1968

Challengers of the Unknown #60

Low
$8
Mid
$20
High
$70
Published February 1968
Cover Price $0.12
Pages 36

The Thing That Could Not Die: The team discovers that Red is not dead but has drank the liquid light formula and become a crazed criminal. 2 Hours to Die!: Prof is trapped in his mini-sub and the team has two hours to rescue him before a bomb explodes.