Break out the emergency gear... The Space Ranger has a job to do! 
Showcase #15 is an issue of the series Showcase (Volume 1) with a cover date of August, 1958.
Synopsis for "The Great Plutonium Plot"
A renegade scientist is stealing all the Plutonium in the galaxy. He hopes to rule the Solar System with his "Teleportator," but needs the radioactive chemical to power it. The Space Ranger follows a few space pirates (via an Audium trail - soundwaves) and is able to locate their hideout. As he and his sidekick, Cryll, rocket towards the thieves main ship, they purposely ram into it, creating a hole in their foe's spacecraft. The pirates are knocked cold, and the Space Ranger takes them to jail.
Appearing in "The Great Plutonium Plot"
Featured Characters:
- Space Ranger (First appearance) (First appearance)
Supporting Characters:
- Cryll (First appearance)
- Myra Mason (First appearance)
Villains:
- Zandor, the Renegade Scientist (Single appearance)
- Jarko, the Jovian Space Pirate (Single appearance)
- Gurph, the Martian Raider (Single appearance)
Other Characters:
Locations:
- 22nd Century
- Milky Way Galaxy
- Earth's Moon
- Mars
- Ganymede (satellite of Jupiter)
- Milky Way Galaxy
Items:
- Teleporter Ray
Vehicles:
- The Solar King (First appearance)
- Utopia (Luxury Liner)
Synopsis for "The Robot Planet"
Appearing in "The Robot Planet"
Featured Characters:
Supporting Characters:
Villains:
- The Great Brain (Super-computer) (Single appearance)
Other Characters:
- The Shann-People (Single appearance)
- Danaan (Single appearance)
Locations:
- 22nd Century
- Milky Way Galaxy
- Sirius System
- Milky Way Galaxy
Items:
- Gravity Machines
Vehicles:
- The Solar King
Notes
- The Great Plutonium Plot is reprinted in DC Super-Stars #8.
- A comic strip "On the Planet Og" is printed in this issue.
See Also