The Beast from 20,000 Fathoms is a 1953 American science fiction monster film directed by Eugène Lourié, with special effects by Ray Harryhausen. The film stars Paul Christian, Paula Raymond, Cecil Kellaway, and Kenneth Tobey. The screenplay is based on Ray Bradbury's 1951 short story "The Fog Horn", specifically the scene where a lighthouse is destroyed by the title character. The film's story concerns a fictional dinosaur, the Rhedosaurus, which is released from its frozen hibernating state by an atomic bomb test in the Arctic Circle. The beast begins to wreak a path of destruction as it travels southward, eventually arriving at its ancient spawning grounds, which includes New York City. The Beast from 20,000 Fathoms was one of the early atomic monster movies, and it helped inspire a generation of creature features and directly inspired Godzilla. Plot Far north of the Arctic Circle, a nuclear bomb test, dubbed "Operation Experiment", is conducted. Prophetically, right after the blast, physicist Thomas Nesbitt muses "What the cumulative effects of all these atomic explosions and tests will be, only time will tell". The explosion awakens a long carnivorous dinosaur known as a Rhedosaurus, thawing it out of the ice where it had been held in suspended animation for millions of years. Nesbitt is the only surviving witness to the beast's awakening and later is dismissed out-of-hand as being delirious at the time of his sighting. Despite the skepticism, he persists, knowing what he saw. The dinosaur begins making its way down the east coast of North America, sinking a fishing ketch off the Grand Banks, destroying another near Marquette, Canada, wrecking a lighthouse in Maine and destroying buildings in Massachusetts. Nesbitt eventually gains allies in paleontologist Thurgood Elson and his young assistant Lee Hunter after one of the surviving fishermen identifies from a collection of drawings the very same dinosaur that Nesbitt saw. Plotting the sightings of the beast's appearances on a map for skeptical military officers, Elson proposes the dinosaur is returning to the Hudson River area, where fossils of Rhedosaurus were first found. In a diving bell search of the undersea Hudson River Canyon, Professor Elson is killed after his bell is swallowed by the beast, which eventually comes ashore in Manhattan. It eats a police officer shooting at it, squashes cars, knocks over buildings and generally causes panic and havoc. A later newspaper report of its rampage lists "180 known