I Married a Monster from Outer Space is a 1958 science fiction horror film, produced and directed by Gene Fowler Jr. from a screenplay by Louis Vittes. It stars Tom Tryon and Gloria Talbott (The Daughter of Dr. Jekyll).
Newly-married Marge Farrell who finds her husband Bill strangely transformed soon after her marriage: He is losing his affection for his wife and other living beings and drops various earlier habits. Soon she finds out that Bill is not the only man in town changing into a completely different person.
Young newlywed Marge Farrell notices her new husband Bill is acting strangely. He doesn’t show any affection towards her or anything else, including his pet dogs, which he used to love. Marge is also concerned that she cannot seem to get pregnant.
She then notices that other husbands in her social circle are all acting the same way. One night she follows Bill while he goes for a walk. She discovers that he is not the man she knew but an alien impostor: An extraterrestrial life-form leaves his body and enters a hidden spaceship…