Oceanographer Ted Stevens (Kent Taylor) meets Bill Grant (Rodney Bell), government investigator, at the scene of another beach murder caused by a hideous sea monster that stands guard over a glowing underwater uranium mine. Meanwhile marine biologist Professor King, who created the monster in his laboratory, is being pursued by a beautiful femme fatale who is blackmailing or killing everyone in sight in an effort to acquire King's top secret files for the Russians. <i>The Phantom From 10,000 Leagues</i> is an often dreamlike, comically surreal study in paranoid '50s sociology. It provides an insightful time capsule of attitudes prevalent at the time. When first released, <i>The Phantom From 10,000 Leagues</i> shared a double bill with Roger Corman's first sci-fi film <em>The Day The World Ended</em>. It was released by American Releasing Corp., an organization that evolved into American International Pictures, a company long associated with monsters, rock n' roll, juvenile delinquents and beach parties.