A scientific expedition searching for fossils along the Amazon River discovers a prehistoric Gill-Man in the legendary Black Lagoon. The explorers capture the mysterious creature, but it breaks free. The Gill-Man returns to kidnap the lovely Kay, fiancée of one in the expedition, with whom he has fallen in love.

Director: Jack Arnold

Writer: Harry Essex, Arthur A. Ross, Maurice Zimm

Actors: Richard Carlson, Julie Adams, Richard Denning

Production: N/A