Unknown World (1951)
With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.
- Country : United States of America
- Genre : Adventure, Science Fiction
- Studio : Lippert Pictures
- Director : Terry O. Morse
- Cast : Bruce Kellogg, Otto Waldis, Jim Bannon, Tom Handley, Dick Cogan, George Baxter