A young policeman is killed by a robber "in a back alley in Lower Marsport". Same robber has now hijacked the little spaceship of the cop's dad, forcing dad to pilot him to safety away from Mars.
During escape, Pop Ganlon will learn that this is the killer. Pop himself will get killed by robber, but only after ensuring that the robber gets the justice due him...
Fact sheet.First published: Amazing Stories, April-May 1953.
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Related: Mars in fiction.