Jungle Jim fights enemy agents who are trying to steal cobalt while disguised as crocodiles.

Jungle Jim must protect rare pony-like animals whose glands produce a powerful narcotic. On the way, he fights a giant spider.

Jungle Jim is out to save Joan from an evil witch doctor whilst simultaneously fighting evil treasure hunter Barton.

Lady scientist, Hilary Parker is searching for a rare drug to help combat polio. Opportunist Bruce Edwards joins the quest but is actually after gold and buried treasure.