Challengers of the Unknown #68
In "One of Us Is a Madman!", the Challengers of the Unknown face a chilling mystery at a secret government lab where scientists have been killed. Written by Denny O'Neil and illustrated by Jack Sparling with inks by Vince Colletta, the story unfolds as the team confronts a terrifying electrical entity born from malfunctioning machines—only to discover that one of their own may be its unwilling host. The cover by Neal Adams captures the tension with striking, dynamic detail.
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The Challengers are called to investigate the killing of scientists at a secret government lab. There, they're attacked by a computer-wraith made of bundled wires charged with electricity. Prof is possessed by the monster's evil spirit and colludes to kill his friends, resisting all the while. The Challs wrap themselves with copper wire to ground the electrical charge and throw dynamite at the monster. Prof guesses Dr. Fillmore drove the computers mad just as Fillmore attacks. The dynamite goes off leaving no sign of Fillmore or the monster. But Prof knows the evil spirit still possesses him.
Plot details indexed by the Grand Comics Database (CC BY-SA).