River Monsters - Season 7 Episode 4 -

Recent reports of fishermen vanishing without a trace on Alaska's south coast leads Jeremy to America's Last Frontier on a mission that takes him on the hunt for one fish he's never hooked before -- the mighty king salmon. When the investigation takes an unexpected turn, Jeremy finds himself in shark-infested waters, observing the salmon shark! Jeremy makes himself shark bait to prove that these fish won't attack a human - even if that human is diving right into the middle of their feeding frenzy.