While this movie was based on the Brian Aldiss short story "Supertoys Last All Summer Long", that short story has less influence on the movie than the famous poem by William Butler Yeats, "The Stolen Child." The text of the poem appears in the movie in two places, and certain stanzas take on literal meaning as well (for example, "Till the moon has taken flight"). There are also many surprising similarities to the Philip K. Dick short story "Second Variety".

Film

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