River Monsters Series 4 .

All nine episodes from the fourth series of the Animal Planet documentary show presented by Jeremy Wade. Each programme follows the extreme angler as he goes on the hunt for deadly fish in various locations including Texas' Trinity River, Zambia's Zambezi River and the jungles of Guyana and South America. The episodes are: 'American Killers', 'Pack of Teeth', 'Invisible Executioner', 'Asian Slayer', 'Killer Sharks and Rays', 'Russian Killer', 'Mongolian Mauler', 'Phantom Assassin' and 'Lair of Giants'.