Challengers of the Unknown #2

Jun-Jul issue

The Traitorous Challenger; activity: Block Busters; cartoon: Peter Puptent Explorer; The Day Earth Was Stolen (text story); The Monster Maker; Headline Heroes: Henry Villard; cartoon: Doctor Rocket

Writers: Jack Kirby, Henry Boltinoff, Mort Drucker, Jack Schiff

Artists: Jack Kirby, Henry Boltinoff, Mort Drucker, Bob Brown