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Mark Ruflow was the first person to play Merrill, who had to withdraw from filming because of a brain tumor.
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M. Knight Samalan insisted that the film poster should not have the face of Mel Gibson, because he believed that the film was a collective work, completely different from "The Sixth Sense of Supernatural".
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Graeme Hayes was an older character at first, but Paul Newman and Clint Eastwood both refused to appear in the film.
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The illustrations in the book about aliens are the masterpieces of Shamaran’s daughter.
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Shamaran once asked James Newton Howard, who was in charge of the film's soundtrack, to intentionally imitate the soundtracks of "The Third Type of Contact" and "Mentally Ill".
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After the filming was over, the producer gave all the corn to the fruit and vegetable market of the Agricultural College.
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Johnny Depp was expected to star in the film.
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The poster that Jacques Phoenix saw in the drafting office was the movie poster of the "Breaking Frontline" in which he starred.
Signs behind the scenes gags
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Merrill: Move children! Vámanos!
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Morgan: [all four member of the Hess family are in front of the tv, watching the lights from alien spaceships hover in the night sky] There are lights in over 274 cities. They think it'll be 400 within the hour. They're appearing at or within one mile of crop signs.
Merrill: [referring to the crop circle in their corn field] They were for navigation. They made a map. They're going to be within a mile of us.
Morgan: Dad!
Graham Hess: Yes?
Morgan: [quoting his new library book about aliens] I think these are stages immediately preceding an attack maneuver. I was wrong. They're hostile.
Merrill: It's like War of the Worlds.
TV Anchor: Ground forces have been assembled in countries throughout the globe. Hundreds of thousands have flocked to synagogues, temples, and churches. God be with us all.
Graham Hess: [about how he and Merrill have been nailing boards over every opening in the house] I'm going to get back to the windows.
Merrill: [Graham leaves and uncle Merill kneels beside the children] You guys okay?
Morgan: Some guy had a sign saying it was the end of the world.
Merrill: Don't worry.
Morgan: You won't let anything happen to us, right?
Merrill: No way.
Morgan: I wish you were my dad.
Merrill: What did you say? Don't you ever say anything like that again. Ever!
[Graham covers the window with another board]