I Married a Monster from Outer Space (1958)

In Norrisville, Bill Farrell (Tom Tryon) leaves his bachelor party on the eve of his marriage with Marge Bradley (Gloria Talbott). He is abducted by an alien that takes his shape and marries Marge on the next day. Marge feels something strange with Bill and one year later she realizes that he is a totally different man. One day, Marge follows Bill and he goes to the woods; she finds that he is an alien and sees his spacecraft. She tries to tell to Washington and to the FBI, but the aliens have dominated key people in town that do not allow any sort of communication with the exterior world. What is the intention of the alien invasion?

"I Married a Monster from Outer Space" is a great sci-fi movie from the 50's. The storyline is a rip-off of "Invasion of the Body Snatchers", with aliens switching places with humans in a small town with the purpose of breeding. But the plot is well-constructed and supported by good performances. My vote is seven.

Title (Brazil): "I Married a Monster from Outer Space"