|Author||Lester del Rey|
|Published in||Astounding Science Fiction|
|Media type||Print (Magazine)|
Two young men, a mechanic, Dave, and a medical student, Phil, collaborate on modifying a household robot, originally meant only to cook and clean. They are more successful than they intended; despite the robot's household programming, it develops emotions. The robot, named "Helen O'Loy" (a play on Helen of Troy and "alloy"), falls in love with Dave. Dave initially avoids her and rejects her advances, but after some time he marries her and they live together on his farm.
Over the years Phil assists her in artificially aging her features to match the changes that occur in her human husband. When Dave inevitably dies, she sends a letter to Phil asking him to dissolve her metallic structure and bury her remains with her husband. She begs him not to let anyone discover their secret. In the final line it is revealed that Phil, who had been narrating the story, had secretly been in love with her the whole time.
"Helen O'Loy" was among the stories selected in 1970 by the Science Fiction Writers of America as one of the best science fiction short stories published before the creation of the Nebula Awards. As such, it was published in The Science Fiction Hall of Fame Volume One, 1929–1964.