What happens
Tarzan, Darnall, Major Burton Ashley, Genet Burton, Dr. Wong Tai and Terrence O'Rourke are captured by a band of half-human giants in an uncharted part of the South Central African jungle. They escape by dugout and are swept through a dark tunnel beneath a towering cliff into a canyon of tall rock pinnacles. The party debates whether the yellow-skinned savages are following them and what kind of creatures they are. Tarzan leaves the group to swing through the trees while the dugout is pulled toward a roaring cataract, and the guide ends with a moment of danger.
An uncharted section of the South Central African jungle, a river tunnel through a cliff, and a rocky canyon near a waterfall
Characters: Tarzan, Darnall, Major Burton Ashley, Genet Burton, Dr. Wong Tai, Terrence O'Rourke
Listen for: The rush of the river through the tunnel and the roar of the cataract ahead
Written from the episode itself; it never gives away the ending. Every recording is remastered for the stream: cleaned of rumble, hiss and mains hum (and the old TV whine where we found it), then levelled in two passes to steady broadcast loudness, so one show is never quieter than the next.