Unknown World

Drilling into the forbidding depths of the earth!

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

Bruce Kellogg

Wright Thompson

Otto Waldis

Dr. Max A. Bauer

Jim Bannon

Andy Ostergaard

Tom Handley

Dr. James Paxton

Dick Cogan

Dr. George Coleman

George Baxter

Carlisle Foundation Chairman

Marilyn Nash

Dr. Joan Lindsey

Victor Kilian

Dr. Jeremiah Morley (uncredited)