Invasion of the Body Snatchers (1956)
Either way, it's a great movie based on the enemy within scenario. Aliens come to earth in giant seed pods and infiltrate the bodies of human hosts. They are indistinguishable from humans, except for their lack of emotion. Since it's hard to tell who's an alien and who isn't, the situation becomes increasingly terrifying.
An interesting aside: The producer, Walter Wanger, shot his wife's lover in the groin after discovering their affair. He was convicted of attempted murder and served 4 months. The Apartment, Billy Wilder's well known movie, was inspired by the incident.
Directed by: Donald Siegel
The cast includes: Kevin McCarthy (Dr. Miles J. Bennell), Whit Bissell (Doctor Hill), Dana Wynter (Becky Driscoll), Larry Gates (Dr. Dan ''Danny'' Kauffman), King Donovan (Jack Belicec), Carolyn Jones (Theodora ''Teddy'' Belicec), Jean Willes (Nurse Sally Withers)
MPAA rating: , Running time: 80 minutes
Presented in: BW
Sci-Fi Channel Ranking: 42
Related titles: Invasion of the Body Snatchers (1978), Body Snatchers (1993)
Related categories: Aliens, Campy, Fab Fifties, Would be great in Color!