The Invasion (2007)

Genre: Horror | Sci-Fi | Thriller
Starring: Nicole Kidman, Daniel Craig, Jeremy Northam, and Jackson Bond
AKA: Invasion of the Body Snatchers (USA) (working title), The Visiting (USA) (working title)
Tagline: Do not trust anyone. Do not show emotion. Do not fall asleep.

Plot: As a Washington psychiatrist unearths the origin of an alien epidemic, she also discovers her son might be the only way it can be stopped.

http://www.imdb.com/title/tt0427392/
http://en.wikipedia.org/wiki/The_Invasion_(film)