Overview
Giant from the Unknown (working titles Giant from Devil's Crag and The Diablo Giant ) is a 1958 independently made American black-and-white science fiction-horror film drama, produced by Marc Frederic and Arthur A. Jacobs, directed by Richard Cunha, that stars Ed Kemmer, Sally Fraser, and Buddy Baer. The film was theatrically released by Astor Pictures in March, 1958 as a double feature with She Demons.
Plot
The citizens of mountain town Pine Ridge, California, are concerned about a series of livestock mutilations in nearby Devil's Crag. A local, Harold Banks, is also found dead there, killed in the same manner as the livestock. Sheriff Parker orders everyone to stay away. Local speculation is that the deaths are supernatural in origin. Native American, "Indian Joe", confirms their fears of a tribal curse, but is driven out of town by the sheriff.
Local geologist Wayne Brooks is told of Banks' death by friends Anne and Charlie Brown, two Pine Ridge siblings. Sheriff Parker is suspicious of Brooks, having heard about a recent confrontation between Brooks and Banks. As the sheriff is questioning him, Dr. Cleveland and his daughter Janet arrive in town. Cleveland is planning to do archaeological research in the area. While Brooks helps Janet pick up supplies, Parker warns Cleveland about the Banks murder. While at dinner with Cleveland and Janet, Brooks, formerly Cleveland's student, offers to be his area guide.
Brooks tells Cleveland of a local Native American legend that evil spirits will rise up in Devil's Crag. He also says that Native American artifacts have been found there and that he has them. Dr. Cleveland reveals that he is searching for the remains of a Spanish expedition that he believes reached Devil's Crag 500 years earlier. The specific group Cleveland is tracing, known as the "Diablo Brigade", split off from the main expedition and was led by a huge man named Vargas, also known as the "Diablo Giant". After dinner, Janet agrees to go on a date with Brooks after he takes Cleveland to his field laboratory.
From Wikipedia (CC BY-SA 4.0).