Challengers of the Unknown #18
In "The Menace of Mystery Island," the Challengers of the Unknown find themselves stranded on a remote Caribbean isle after June inherits it, only to uncover an alien creature they name Cosmo. With a dormant volcano suddenly erupting and the team split, they must survive treacherous terrain and a hidden weapons cache, all while Cosmo reveals surprising abilities—eye-beams and force-paw projections—helping them confront a secret threat. Written by Dave Wood and illustrated by Bob Brown, with inks by Brown and lettering by Stan Starkman, this 1961 adventure features a cover by Bob Brown that captures the island's eerie, mysterious atmosphere.
Sell my copy
Have this issue — or a whole collection? Get a fair offer from us, skip the marketplace fees and the hassle.
We Buy Collections ▸Cast · 14 characters
Full credits
Full plot ⚠ may contain spoilers
▸ Reveal full plot — may contain spoilers
On a Caribbean island June has inherited, the Challengers rescue an alien creature and name it Cosmo. An active volcano on the island splits the team. When Prof and Red are almost killed, they find that the volcano is man-made and are trapped by a steel cage. Meanwhile, Ace, Rocky, and June are snared in a steel net. Cosmo chews through the steel and projects eye-beams that disintegrate foliage as they hunt for Prof and Red, who had been captured by thugs. Cosmo's paws project force-beams to disarm the thugs -- who had been using the island as a weapons depot -- so the Challs can subdue them.
Plot details indexed by the Grand Comics Database (CC BY-SA).