The Watch 2012

An outrageous comedy in which four everyday suburban guys (Ben Stiller, Vince Vaughn, Jonah Hill and Richard Ayoade) come together to form a neighborhood watch group, but only as an excuse to escape their humdrum lives one night a week.  But when they accidentally discover that their town has become overrun with aliens posing as ordinary suburbanites, they have no choice but to save their neighbourhood - and the world - from total extermination.