Superman and The Mole Men

Superman and the Mole Men is a 1951 American independent black-and-white superhero film released by Lippert Pictures. Produced by Barney A. Sarecky and directed by Lee Sholem, it stars George Reeves as Superman and Phyllis Coates as Lois Lane. It is the first feature film based on any DC Comics character.
The film's storyline covers reporters Clark Kent and Lois Lane arriving in the small town of Silsby to witness the drilling of the world's deepest oil well. The drill, however, has penetrated the underground home of a race of small, bald humanoids who, out of curiosity, climb to the surface at night. They glow in the dark, which scares the local townsfolk, who form a mob intent on killing the strange visitors. Only Superman can intervene to prevent a tragedy.