Strange Invaders

In 1958, the small town of Centreville, Illinois is quietly invaded by extraterrestrial aliens who freeze its inhabitants into crystalized pulsing blue orbs and assume their identities. Twenty-five years later, a young professor named Charles Bigelow travels to Centerville to find his missing ex-wife Margaret, only to discover she's one of the aliens, tasked with escaping her human life for that of a world not her own.