Officers identify a powder used to make designer drugs, and the search begins for where it came from and who it was for. Officers receive a tip-off about a traveler from someone who supposedly knows her well, saying she's planning to smuggle drugs.
A traveler claims he's shocked by the discovery of a firearm in his luggage. Officers question a luxury fountain pen maker; her story of coming to the U.S. for a vacation raises suspicions that she may be planning to work while she's here.
Officers investigate an academic returning from the Dominican Republic with dead specimens. A tip comes in about a traveler running a massage parlor linked to sex trafficking. Drugs worth $1,000,000 are intercepted before leaving the United States.