Jeremy Wade travels to Papua New Guinea to investigate a spate of bizarre deaths on the Sepik River. An island renowned for cannibalism, macabre rituals, and head hunters, Wade is on the trail of creature reported to devour certain male body parts.

Jeremy Wade travels to the Paraná River in the remote corner of Argentina to investigate the death of a young girl. This creature is not armed with bone crunching jaws or razor sharp teeth but a razor-sharp blade tipped with tissue destroying venom.