While playing with Bronty in the forest, Dino Boy is captured by a pterodactyl. After it is attacked by another pterodactyl, Dino Boy is dropped into Horror Swamp where he is captured by the dreaded Worm People and is then imprisoned within a giant beetle pit. Ugh is able to track him down and rescue they youth before it is too late.
Elenco: Don Messick , Gary Owens , Keye Luke , Mike Road , Tim Matheson , Alan Reed , Johnny Carson , Ted Cassidy , Vic Perrin , Ginny Tyler .