The Mysterious Island is a 1929 US part-talkie science fiction adventure romance film. It features Lionel Barrymore, Jacqueline Gadsdon, Lloyd Hughes, and Montagu Love. A film based on Jules Verne's 1874 novel of the same name. 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 daughter 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.