Released December 15, 1948. The first of Columbia's Jungle Jim series starring Johnny Weissmuller. George Reeves guest stars.
From Wikipedia:
"After attempting in vain to save a man from being mauled to death by a leopard, Jungle Jim discovers a vial containing an unknown potion. He takes it to district commissioner Marsden, who identifies it as being from the hidden temple of Zimbalu and brings in Dr. Hilary Parker to head up an expedition with Jim as her guide. An opportunistic photographer, Bruce Edwards, follows as Dr. Parker seeks what she believes could be a miraculous breakthrough in medicine. Jim is more concerned that witch doctors use what's in the vial as a deadly poison..."
Johnny Weissmuller – Jungle Jim
Virginia Grey – Dr. Hilary Parker
Rick Vallin – Kolu
George Reeves – Bruce Edwards
Lita Baron – Zia
Holmes Herbert – Commissioner Geoffrey Marsden
Tex Mooney – Chief Devil Doctor
Steve Calvert – Gorilla
Al Kikume – Native Bearer / Tribesman