all hell breaks lose.. in the Arctic! haha! this movie is beyond amazing. Mary Elizabeth Winstead is amazing as always, she's really has clicked with this kind of movie remembering her act in Final Destination 3. to think if i was in this movie my wall of defense will go as high as possible even the berlin wall will be there again haha! the most interesting part of this movie is because you didn't know who you're gonna trust 'cause everybody could be an alien copying you.