Challengers of the Unknown #78

In "The Isle of No Return," the Challengers of the Unknown and their honorary member June Robbins race against time to stop a burglar who can walk through walls, tracking him to an abandoned lab once run by the enigmatic Prof. Macon. There, the thief, Anton Zammer, unleashes a shrinking ray to trap the team—only for June to outwit him and help turn the tide.

When pilot June Robbins crash-lands on a mysterious island, she stumbles upon an ancient lamp in a hidden cave—only to be overcome by strange fumes. The Challengers of the Unknown follow her trail, uncovering a secret valley where they’re ambushed and discover June, now under a spell and wielding unknown power, bound to the will of the sinister Charles Agar.