River Monsters - Season 3 - Eps 3: Silent Assassin
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.
About River Monsters

Title: River Monsters
First Air Date: 2009-04-05
Last Air Date: 2017-05-28
Status: Ended
Rating: 7.2/10 (from 53 votes)
Language: EN
Seasons: 10
Total Episodes: 59
Network: Animal Planet
Genres: Documentary, Action & Adventure, Reality
Production Companies: Discovery Productions, Icon Films
Synopsis
Extreme angler Jeremy Wade is on the hunt for fish with a taste for human flesh. This rip-roaring ride mixes action and adventure with mysteries, edge-of-the-seat chase and a battle of wills between man and nature.
Cast

Jeremy Wade
Himself