River Monsters (2009)

S03E07 Jungle Killer

Jeremy Wade embarks on a quest to uncover South America's ultimate river monster. While piranhas often steal the spotlight, he suspects a more terrifying predator might be hiding in its waters. After hearing a chilling report of a diver's attack, Jeremy realizes he’s onto something significant. Guided by a local Amerindian tribe, he ventures deeper into the uncharted jungles of Suriname, preparing to confront a fearsome jungle killer unlike any he has encountered before.