Continuity mistake: The film starts in Muncie Indiana. There is a scene in the hills near the town. There are NO hills near Muncie, it's flat as a board. (00:24:30)

Close Encounters of the Third Kind (1977)
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Directed by: Steven Spielberg
Starring: Lance Henriksen, Richard Dreyfuss, Teri Garr
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More mistakes in Close Encounters of the Third Kind More quotes from Close Encounters of the Third Kind More trivia for Close Encounters of the Third KindMore questions & answers from Close Encounters of the Third Kind
Project Leader: He says the sun came out last night. He says it sang to him.
Trivia: The aliens that come out of the ship at the end of the movie were played by 7 year old girls and the scene had to keep being re-shot because their fake alien heads weighed 5 pounds each.
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Answer: It wasn't definitively answered, but it appears the aliens took people in order to learn more about humans. It's unclear if all those who were returned had originally gone willingly, but the intent was not to keep them indefinitely or harm them, and they were returned to Earth, albeit many decades later. At the end, after the aliens had made contact, a new group of humans, including Roy, went with them voluntarily.
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