Neither Rain nor Sleet (S02E03)

Capitol Hill shuts down after a senator’s intern opens up a letter filled with anthrax. Agent Dani Toretti arrives on the scene and has her own theory that the killer is a lone wolf. After a discovery that the attack may be more widespread than previously believed, Dani and Ryker investigate an outbreak at a mail facility. At USAMRIID, Bruce begins to wonder who he can really trust. (National Geographic)