River Monsters - Season 6 (2014)

It was hailed as the safest boat on the river, but when the Sobral Santos sank on a pitch-black night, it's said many of the passengers were eaten alive. The death toll ran into the hundreds and dwarfs all of angling explorer Jeremy Wade's previous investigations combined. So, what was to blame? A river this vast hides many dangerous secrets, and Jeremy will have to travel hundreds of miles to retrace the doomed boat's last voyage. On the way he faces adversaries, old and new, as he goes to extreme lengths to uncover what was behind the Amazon Apocalypse.

Biologist and freshwater detective Jeremy Wade continues his year of Amazon exploration, investigating three mysterious deaths in three separate countries: Peru, Colombia and Brazil. The bodies have been recovered with bizarre injuries, the likes of which Jeremy has never seen before. In a bid to get to the truth, Jeremy embarks on his most remote mission yet, crossing dangerous borders and passing through the territories of warring tribes to live with the Matis, a mysterious, secretive tribe, deep in the Brazilian Amazon. Can they get him closer to the terrifying ...

Investigating reports of a brutal riverside mutilation, Jeremy Wade heads to remote wetlands. There, he comes face to face with one of South America's greatest freshwater fighters and uncovers the slasher stalking Argentina's River of Blood.