River Monsters 4x13
River Monsters season 4
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4x1American Killers Apr 01, 2012 -
4x2Pack of Teeth Apr 08, 2012
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4x3Invisible Executioner Apr 15, 2012
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4x4Asian Slayer Apr 22, 2012
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4x5Russian Killer May 06, 2012
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4x6Mongolian Mauler May 13, 2012
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4x7Phantom Assassin May 20, 2012
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4x8Lair of Giants May 28, 2012
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4x9Episode 9 May 27, 2012
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4x10