Unknown World

With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.

• Millard KaufmanScreenplay
• Terry O. MorseDirector
• Ernest GoldOriginal Music Composer

• Bruce KelloggWright Thompson, Jr.
• Otto WaldisDr. Max A. Bauer
• Jim BannonAndrew "Andy" Ostergaard
• Tom HandleyDr. James Paxton
• Dick CoganDr. George Coleman
• George BaxterCarlisle Foundation Chairman
• Marilyn NashDr. Joan Lindsey
• Victor KilianDr. Jeremiah Morley (uncredited)