Unknown World (1951)

Director: Terry O. Morse

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

Cast

Bruce Kellogg

Wright Thompson, Jr.

Otto Waldis

Dr. Max A. Bauer

Jim Bannon

Andrew "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)