The gold hunters of “Bering Sea Gold” (Fri., 10 p.m. EST on Discovery) use high-powered vacuums on the bottom of the sea in their work to try and find gold there. But as with any equipment underwater, working with them can be dangerous. Emily, the newest member of the team, who’s trying to make money to pay for school, got a scare that had her questioning if the potential payoff was worth the risk.