Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
Airside at JFK Airport, officers rush to inspect some high-maintenance passengers and a mother and son are suspected of money structuring in Detroit. (S1, ep 7)
An inside smuggling job is suspected at JFK Airport. Food couriers could be carriers and in Detroit, a wrong turn separates some buds. (S1, ep 8)
In New York, an air passenger is shaking in secondary and a package concealed in carbon paper doesn't go unnoticed. (S1, ep 6)
A frequent visitor of drug source countries is questioned in New York and a Canadian cowboy may be a mule. (S1, ep 9)
A bus passenger presents curious concoctions at JFK Airport and a Chicago canine sniffs out a stash of cash. (S1, ep 10)
In Chicago, officers find some questionable medicine, hikers get into trouble and an architect's story seems suspicious. (S1, ep 11)
Outbound officers search for a fugitive in Washington State and a Vegas-bound Dutch cook is grilled in secondary at Detroit Metro Airport. (S1, ep 12)
A returning American is cuffed at the Peace Arch crossing in Washington and in Detroit, a German rock band rolls straight into secondary. (S1, ep 13)
At Detroit Metro Airport, a traveller minding manners may need to mind his story instead and the Chicago canine unit knows smugglers don't play games. (S1, ep 14)
A Canadian crosses the Ambassador Bridge in Detroit by mistake and her bag of medicinal marijuana may cost her. (S1, ep 15)