'Knowing' can be summed up in four short words. Great film - rubbish ending.
SPOILER!! SPOILER!! SPOILER!! SPOILER!! READ FROM HERE AT YOUR OWN RISK!!
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The ending lets the whole movie down - yeah it's not the happy 'save the world' ending we were (in a way) dreading. But that just certain kids were the only ones being saved and no adults at all was just ridiculous.
Have the producers, etc never read 'The Lord of the Flies'? Kids do not do well on their own. They also do not just happily accept being taken by aliens to a strange new world; they do not happily accept not only the deaths of their families and friends (assuming friends are not of the 'chosen') but also the death - apparently - of even their planet.
Why couldn't they have had the aliens stay with them as the 'adult' influence at the very least? Why were only certain children rescued, why no adults? Why were the children behaving like mini 'stepford wives' at the end, in spite of the trauma they had gone through? The film is fantastic up to the last fifteen minutes and then it all goes to hell in a handcart.
It was like the writer, and later the director, thought this was a good way to just end it as they were bored. Come up with some ridiculous reason to end the world - have the men in black (yes we all got that little 'wheeze') actually be the aliens, save the kiddies (punters like to see 'little timmy' survive) and there you have it; the perfect ending if you've got bored with your project.
Well, I can vouch for the fact it's NOT. Next time, if you're going to make a movie this good - make the ENDING as good too, or else we (the viewers) just feel cheated. If you get bored - walk away and let someone else finish it.
Out of 10 - I give it 4; and that's just because of the rubbish ending.