The Unknown Terror

They dared enter the Cave of Death to explore the secrets of hell!

A woman leads an expedition into a remote jungle to find her long-lost brother, but instead finds a mad scientist who has created a fungus monster that feeds on the local inhabitants.

John Howard

Dan Matthews

Mala Powers

Gina Matthews

May Wynn

Concha Ramsey

Gerald Milton

Dr. Ramsey

Duane Grey

Lino

Richard Gilden

Raoul Koom

Gerald Gilden

Raoul Koom

Sir Lancelot

Sir Lancelot

Patrick O'Moore

Dr. Willoughby

William Hamel

Mr. Trainor

Martín Garralaga

Lead Villager

Charles Grey

Jim Wheatley / ?The Monster Man

Charles Postal

Higgs (butler)

Charles Cirillo

Native (uncredited)

Jim Whitecloud

Native (uncredited)

Foster Hood

Native (uncredited)

Paul Richards

Peter Morgan