Impostor by Philip K. Dick (Astounding, June 1953) starts with the protagonist, Olham, having breakfast with his wife. During this they talk about a permanent war with the Outspacers, aliens from Alpha Centauri, and the recent development of the protec-bubbles that now surround the planet. What is also cleverly inserted into this opening section is the seemingly inconsequential mention of a fire at nearby Sutton Wood, a location that will reappear later in the story.
When Olham is later picked up to go to work by an older colleague called Nelson (they are both high ranking officials at a defence project), Olham sees there is another man in the car. The man identifies himself as Peters, says he works for security, and that he is there to arrest Olham for being an Outspace spy. The car quickly gets airborne and heads for the Moon while Peters calls his boss to tell him about the successful arrest.
The rest of the story is a fast-paced tale that sees Peters explain that an Outspace ship with a humanoid robot containing a U-bomb recently penetrated the protec-bubble surrounding Earth. Peters then states that Olham is the Outspace robot, and that they intend dismantling him on the far side of the Moon. Olham frantically tries to convince Peters and Nelson that the robot must have failed to reach him, and that he is the real Olham. However, when they land on the Moon, and Olham sees he still has not convinced them, he says he is about to explode. Nelson and Peters flee from the car (they have put their spacesuits on before landing), and Olham quickly closes the door and returns to Earth.
The final section of the story (spoiler) sees Olham return home, escape from an ambush, and eventually make his way to Sutton Wood. There he finds the remains of a burnt-out Outsider spaceship. Then, when Peters, Nelson and a security detail arrive shortly afterwards, Olham manages to convince Peters to go over and look at a body lying near the wreckage. Peters and the team look at the body and decide that it is the robot, but then Nelson pulls on what he thinks is the metal corner of the U-bomb in the robot’s body:
Nelson stood up. He was holding onto the metal object. His face was blank with terror. It was a metal knife, an Outspace needle-knife, covered with blood.
“This killed him,” Nelson whispered. “My friend was killed with this.” He looked at Olham. “You killed him with this and left him beside the ship.”
Olham was trembling. His teeth chattered. He looked from the knife to the body. “This can’t be Olham,” he said. His mind spun, everything was whirling. “Was I wrong?”
He gaped.
“But if that’s Olham, then I must be . . .”
He did not complete the sentence, only the first phrase. The blast was visible all the way to Alpha Centauri.
This suspenseful and paranoid piece has a dreamlike feel (apart from Olham’s nightmarish predicament there is the quick trip to the moon and back), and you never really know until the final moments if Olham is a robot or not.1 This, and the fast pace of the story, keeps the reader off-balance and lets the writer gloss over one or two things that might have revealed Olham’s true nature (the brief door opening on the Moon; the question of how the robot would get Olham’s memories).
An impressive piece that reflects the Reds-under-the bed fears of the time, and Philip K. Dick’s only sale to John W. Campbell (I note that the story is another exception to Campbell’s supposed Human Exceptionalism rule2).
**** (Very Good). 5,400 words. Story link.
1. Dick would return to this theme in Do Androids Dream of Electric Sheep? (which was later filmed as Bladerunner).
2. A writer remarked to me, “It’s a story where The Thing wins”.