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Graded population
CGC records 102 graded copies for Showcase #16 (1958). Population is the number recorded by this grading source, not the total print run or all surviving copies.
Space Ranger: "The Secret of the Space Monster"
A spaceship pilot reports to President Thaddeus Starr about a space monster sighting while flying near Ganymede, a moon of Jupiter. President Starr's son Rick is skeptical since there has never been a report of any "space monsters" before. He decides to travel to Ganymede as the Space Ranger to check out the bizzare sighting.
En route, he and Cryll view an unusual meteor bombardment heading towards them. Cryll panics, but Rick has a theory and stays on course. The meteors pass right through their ship like a mirage. Rick explains that real meteors wouldn't have made the ionization reactor needle spin like it just was. He believes the meteors and the space monster sighting were man-made illusions to keep people away from Ganymede.
Creative credits
Writers: Gardner Fox, Gardner Fox, Edmond Hamilton, Edmond Hamilton
Interior art: Bob Brown, Bob Brown
Source records & attribution
Panel Profits keeps each source identity attached to its edition record.
COMICBASE: comicbase:974971
GCD: 14595