Jack Byron

Dr. Jack Byron is the hidden main human antagonist of the film Anacondas: The Hunt For The Blood Orchid. He is portrayed by Matthew Marsden.

History
Jack was part of a team of pharmaceutical researchers who went to a jungle in Borneo to search for the "blood orchid", a flower with miraculous effects. Jack bribes their guide to make them take an unsafe path through the river, however a giant Anaconda attacks their boat and kills one of the team members. The others escape through the river and arrive in a deserted native village, where everyone but Jack decides to abandon the orchid quest and to build a raft to leave the jungle. After unsuccessfully trying to convince one the team members to continue the expedition, Jack uses a poisonous spider to paralyze him, and an anaconda devours him a few moments later. Jack joins the others and manages to steal their raft, then he goes find the orchids.

Later, Jack succeeds to find the blood orchids above an anaconda pit. The rest of the team then arrives, but Jack points a gun on them and obliges one of them to retrieve the orchids. However, once it's done the backpack containing the orchids falls into the pit. Jack tries to seize it, but his spider escapes its jar and paralyses him. He falls into the pit and is devoured by the anacondas.