Appearing in "Ultivac is Loose!"Edit

Featured Characters:

Supporting Characters:

  • June Robbins (First appearance)
  • Felex Hesse (Flashback and main story) (Single appearance)[1]


Other Characters:

  • Floyd Barker (Flashback and main story) (Single appearance)[1]



  • None


  • Helicopter
  • Ace's Plane (Destroyed in this issue)

Synopsis for "Ultivac is Loose!"Edit

As the Challengers are pondering when their next adventure will be, they are interrupted by the arrival of former war criminal Felex Hesse. He asks the Challengers to protect him from his rogue creation Ultivac. Ultivac, he explains, is a giant robot built by he and fellow former prisoner Floyd Barker, which upon activation went after his creator. Once he finishes explaining his story, the group are attacked by Ultivac. Unable to stop Ultivac from capturing Hesse, the Challengers seek the help of a top secret laboratory and its director general June Robbins. Meanwhile Ultivac has constructed an army of robots modeled after Hesse to collect resources it needs for continued existence. The Challengers find and incapacitate it. Hesse and Barker repossess the robot and try to make money displaying it as a sideshow attraction. However, Ultivac, having developed a liking to Robbins, breaks free and kidnaps her. The Challengers talk Ultivac into peaceful relations with humanity when suddenly Hesse arrives and destroys it with a ray gun. Rocky is injured in the altercation. With Ultivac destroyed, Hesse is taken away and Rocky undergoes surgery, making it through with flying colors.


  • The story is broken into four chapters;
  1. Ultivac is Loose!
  2. A Challenger Must Die!
  3. The Fearful Millions
  4. The Fatal Prediction
  • There is a Moolah the Mystic strip in this issue.


  • No trivia.

See Also

  • None.

  • None.
  1. First and only known appearance to date besides flashbacks
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