The Mysterious Island

On a volcanic island near the Kingdom of Hetvia rules Count Dakkar, a benevolent leader and scientist who has eliminated class distinction among the island's inhabitants. Dakkar, his sister Sonia and her fiance, engineer Nicolai Roget have designed a submarine which Roget pilots on its initial voyage just before the island is overrun by Baron Falon, despotic ruler of Hetvia. Falon sets out after Roget in a second submarine and the two craft, diving to the ocean's floor, discover a strange land populated by dragons, giant squid and an eerie undiscovered humanoid race.

• 
  Lucien Hubbard
• 
  Maurice Tourneur
• 
  Benjamin Christensen

• 
  Lionel Barrymore
  Andre Dakkar
• 
  Jacqueline Gadsden
  Sonia Dakkar
• 
  Lloyd Hughes
  Nikolai Roget
• 
  Montagu Love
  Mikhail
• 
  Snitz Edwards
  Anton
• 
  Gibson Gowland
  Dmitry
• 
  Dolores Brinkman
  Teresa
• 
  Karl Dane
  (uncredited)
• 
  Pauline Starke
  (uncredited)
• 
  Carl Roup
  Underwater Creature (uncredited)
• 
  Angelo Rossitto
  Underwater Creature