A case of mercury poisoning that could turn into an epidemic puts Hood, Young and an eager field agent to work tracing the source of the mercury, but as every lead becomes a dead end they must begin looking for an unnatural cause.

Cast: Rufus Sewell, Marley Shelton, Cari Champion, Michael Cudlitz, Mohammad Kavianpour, Kevin Linehan, Omar Benson Miller, John Murray, Ion Overman, Eric Pierpoint, Susan May Pratt, Ric Sarabia, Ben Shields, Bernard White