Planet Comics #10

Planet Comics #10 is an anthology featuring multiple science fiction adventures. "Gale Allen of the Space Patrol" follows Gale as she becomes involved in a conflict where an enemy fleet approaches; a character named Jack ignores warnings and destroys much of a fort with a machine explosion, but Gale's persistence helps them escape. On Mars, a protagonist crashes his ship while attempting an emergency landing and then discovers a mysterious blackout affecting the Martian city; he manages to obtain a sample of the blackout gas to help Martian scientists find a counter-agent. "Don Granval on Neptune" features Don Granval, a young scientist who has built a laboratory beneath Neptune's seas to study strange life forms there; when suddenly interrupted, he speeds to the kingdom of Sardo in his powerful submarine in response to an urgent summons from King Sardo.