It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end of the Civil War. The balloon drifts for days and finally lands on a mysterious volcanic island with very unusual inhabitants. Also landing, in a better aircraft, is Rulu, a visitor from Mercury. She seeks a radio-active material that will enable her to manufacture an explosive that will destroy the world or, at least, the portion known as Earth in this 15 Chapter Serial from the 1950s.

• DirectorSpencer Gordon Bennet
• Release13 September 1951
• Genre
  Science Fiction / Adventure
• Duration4h 12m
• Budget?
• Revenue?
• Rate
  

  5.3
  4 reviews
• Productions

  Columbia Pictures