Issue: #23
Last valuation update: 2026-06-24
ContentsI Scout Earth's Strangest Secrets!Professor EurekaThe Creeping Creatures of SteelThe Brief Life of Mr Mechano (a text story)The Crazy House! (reprinted from The Phantom Stranger #4)The Curse of the Prophetic Pencil
First appearances: Mark Merlin, Elsa
Creators: Bernard Baily, Mort Meskin, Jack Miller, Mort Drucker, Ira Schnapp, Henry Boltinoff, George Roussos, Stan Starkman, Jack Schiff
Characters: Mark Merlin, Professor Eureka, Elsa