Superman and the MoleMen (1951)
When underground beings explore the surface world from a deep oil well and inadvertantly cause a panic, only Superman can prevent a tragedy
The Premonition (1976)
A foster mother begins experiencing psychic visions after the psychotic biological mother of her foster daughter begins stalking them
Butch and Sundance: The Early Days (1979)
A prequel of sorts to Butch Cassidy and the Sundance Kid 1969 which chronicles the two outlaws lives in the years before the events portrayed in the 1969 movie