The Crystal Crypt

The Crystal Crypt is a science fiction short story by Philip K. Dick, first published in January 1954 in Planet Stories. Set aboard an Inner-Flight spaceship, it depicts the last group of Terran passengers fleeing Mars amid rising tensions between the two planets. The narrative explores themes of espionage, identity, and the threat of war, as passengers are confronted by a Martian official searching for saboteurs responsible for a city's destruction, leading to a suspenseful revelation about the true identities of the saboteurs on board.