McGoohan is a nasty, glory-seeking crypto-zoologist following up rumours of a brontosaurus family living deep in the Congo. His persistent assistant (Young) decides to venture into the bush herself when he dismisses her discovery of a set of bones. Then follow standard chases up and down the jungle, plus brushes with natives and soldiers, as the adversaries and their allies try to steal the creatures off each other. The bronts are brilliant, while snappy dialogue keeps the film from sinking into the absurd. Undemanding Disney family entertainment.