The Unknown Terror
- Rok: 1957
- Kraj: United States of America
- Gatunek muzyczny: Horror
- Studio: Emirau Productions, Regal Films
- Słowo kluczowe: amazon rainforest, mad scientist, missing person, underground cavern, man with limp, fungus people, primitive village
- Dyrektor: Charles Marquis Warren
- Odlew: John Howard, Mala Powers, Paul Richards, May Wynn, Gerald Milton, Duane Grey