Dino Boy is captured and imprisoned by the fearsome Treemen tribe, who plan to sacrifice the youth to their prehistoric vulture gods. The vultures move in for the kill as Ugh puts his rescue plan into effect, causing a large group of wooly mammoths to stampede through the Treemen's habitat. During the rescue, Dino Boy falls into the river below but is rescued by Ugh.
Elenco: Don Messick , Gary Owens , Keye Luke , Mike Road , Tim Matheson , Alan Reed , Johnny Carson , Ted Cassidy , Vic Perrin , Ginny Tyler .