The Alligator People (1959)

Storyline :

The Alligator People (1959) A newlywed couple sit in a train. The husband receives a frantic telegram. He gets off at a station to make a phone call, the train pulls away without him on it, and that's the last his wife sees of him. Years later after a long search she finally tracks him down on his family's southern estate where she discovers that a failed medical treatment has turned him into an alligator mutant.