USA,
2012, 7 h 2 min
(Length: 42–86 min)
VOD (2)
Episodes(8)
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American Killers (S04E01)
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Pack of Teeth (S04E02)
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Invisible Executioner (S04E03)
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Asian Slayer (S04E04)
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Russian Killer (S04E05)
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Mongolian Mauler (S04E06)
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Phantom Assassin (S04E07)
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Lair of Giants (S04E08)
Gallery (103)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122492_8dffa7.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122494_184558.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122495_a8fe00.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122496_4a27ea.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122497_a3d4c3.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122498_350bb6.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122500_243356.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122501_80215a.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122502_67416b.jpg)
American Killers (S04E01)
Photo © Discovery Networks
![River Monsters - Season 4 - American Killers - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/167/122/167122503_33a0d3.jpg)