

With the cyclotram, an atomic-powered rock-boring vehicle, Dr. Jerimiah Morley leads an expedition into a subterranean world.
Practical Effects
The cyclotram model work is gloriously janky—pure cardboard genius.
Production
Reused sets from 'Superman' serials and 'King Kong'—budget cinema archaeology.

Director
Terry O. Morse
Trivia, insights & behind the scenes
The cyclotram prop was later recycled for the 'Superman' TV series—Hollywood's ultimate indignity.
Released months before the first nuclear submarine launch, it captures a weird moment when 'atomic' meant limitless possibility, not annihilation anxiety.