Showcase — DC Comics, National Periodical Publications
Issue: #12
Last valuation update: 2025-12-19
The unknown is challenged once again! When criminals get their hands on mysterious vials from an ancient civilization, The Challs have their hands full!
First appearances: Amos Hunter, Karnak
Creators: Jack Kirby, Artie Simek, George Klein, Dave Wood, Jack Schiff
Characters: Ace Morgan, Prof Haley, Red Ryan, Rocky Davis, The Kraken, Professor Eureka, Amos Hunter, Karnak