FBI Representatives

Bureau of Alcohol, Tobacco, Firearms and Explosives

 * Special Agent - Steven Troy, (FBI S1 E8 and S4 E9)

Department of Homeland Security Services

 * Special Agent - ____ Belmont, (FBI S3 E9)
 * Special Agent - Mary _____, (FBI S1; E1 - E2, E5. S2 E1)
 * Special Agent - Allison Bryan, (FBI S2 E15)

Drug Enforcement Administration

 * Special Agent - Andy _____, (FBI S2 E5)

New York Police Department

 * Detective - _____ Walsh, (FBI S4 E6)
 * Rank ? - ____ Martinez, (FBI S1 E3)
 * Rank ? - Tommy Vance, (FBI S4 E11)
 * Officer - Ann _____, (FBI S2; E1, E3, E15. S3 E1)
 * Rank ? - Maya ____, (FBI S4 E12, E13 & E14)

Central Intelligence Agency

 * Special Agent - ____ Collins, (FBI S2 E8)
 * Special Agent - Frank ____, (FBI S1 E5)
 * Special Agent - Anne Porter, (FBI S1 E5)

National Security Agency

 * Special Agent - Sarah _____, (FBI S2 E12 and S4 E2)

Port Authority

 * Rep - Marcus, (FBI S4 E12)