Border Security: America's Front Line - Season 4

Packaged sweets leave a sour taste at JFK Airport. A Dutch traveler may be making hay of his trip stateside. It's a case of mistaken identity for one traveler in Washington State. Mail centre officers uncover some monkey business. Party girls have their plans deflated.

A traveler claims he's flown in for a wedding, but officers don't believe his vows. In Detroit, an unconventional Canadian is fuming in secondary. Clearance for a package from China isn't going swimmingly. In Washington, a family afternoon in the park ends in secondary.

A tense traveler returns from a short trip to Colombia with an unusual amount of luggage. In Detroit, a pregnant passenger can't deliver her due date. At JFK Airport, cargo officers are reading into the leaves. A package from India is stopped at the door. A Nexus holder's good deed in Washington state gets him pulled in for questioning.

Detroit's Ambassador Bridge officers make an auto theft arrest. Vials turn up by the dozen at the JFK Mail Facility. An American is carrying some cold-blooded companions in his backseat at the Detroit-Windsor tunnel. In New York, a traveler is showing signs of possible smuggling. A family reunites at Detroit Metro Airport.

JFK Airport officers are on high alert for drugs concealed in backpacks. In Washington state, red flags arise when a driver shows up with someone else's vehicle. A wrong turn at the tunnel leads to trouble for a Detroit citizen. A young traveler looking for the American Experience gets one in secondary.

In Michigan, the canine unit uncovers double trouble. Bloodstained baggage is found at Detroit Metro Airport. In New York, an air passenger is shaking in secondary. On the West Coast, officers suspect a Canadian citizen is hiding his California love. A package concealed in carbon paper doesn't go unnoticed.

In New York, a traveller carries a questionable past on his back. Contraband arrives at the mail facility by the bushel. Airside at JFK Airport, officers rush to inspect some high-maintenance passengers. A mother and son are suspected of money structuring in Detroit. Officers pull no punches at the Ambassador Bridge. A pair of hockey fans is returned for misconduct. A fugitive shows up at the Peace Arch crossing.

An inside smuggling job is suspected at JFK Airport. Food couriers could be carriers. In Detroit, a wrong turn separates some buds. At the Peace Arch in Washington, two German tourists have a lot on their plates. A baggage exam turns sour at Detroit Metro. Mail officers cut to the chase.

An officer peels back a resistant traveller's luggage. There are no mistaken identities in the JFK Mail Facility. In Detroit, an impatient shopper makes a date with destiny. A frequent visitor of drug source countries is questioned in New York. A Canadian cowboy may be a mule.

A bus passenger presents curious concoctions at JFK Airport. A Chicago canine sniffs out a stash of cash. A Canadian vehicle may be far too seedy to enter Detroit. In Washington State, officers discover an American's alter ego. Officers rake through suspicious henna leaves in New York.

Chicago airport officers discover some bad medicine. At the JFK Mail Facility officers crack into a rotten egg boiler. In Blaine, three unprepared Canadian hikers are spinning their borrowed wheels. A Canadian architect has CBP wondering if his story is sketchy in Port Huron, Michigan.

Outbound officers search for a fugitive in Washington State. A Vegas-bound Dutch cook is grilled in secondary at Detroit Metro Airport. A CBP canine sends several packages to the doghouse at the Chicago Mail Facility. X-rays reveal a concerning cargo anomaly in Port Huron. A young traveller protests a baggage exam at JFK Airport.

JFK Airport officers' expertise in telltale body language pays off. In Detroit, a German rock band rolls straight into secondary. A returning American is cuffed at the Peace Arch crossing in Washington. A CBP Agricultural Specialist checks out a package with a terse warning. At the Ambassador Bridge in Detroit, a hole is discovered in one traveller's story. Port Huron officers are given the puppy eyes.

At Detroit Metro Airport, a traveller minding manners may need to mind his story instead. The Chicago canine unit knows smugglers don't play games. In Port Huron, officers are on a high-speed chase after a vehicle skips secondary. A traveller coming from Canada triggers radiation alarms. A bounty of bullets shows up in Blaine, Washington.

In Buffalo, officers suspect a fertilizer salesman may be cultivating a lie. A Canadian crosses the Ambassador Bridge in Detroit by mistake, and her bag of medicinal marijuana may cost her. An outbound traveller has a fluctuating cash declaration at O'Hare Airport. Chicago Mail Center Officers find more than Monopoly money inside packaged board games. In Port Huron, a routine check on a traveller comes back as armed and dangerous.

In New York City, a laptop belonging to a Caribbean traveller does not compute. A young Brit arrives at Detroit Metro Airport to visit an American cyber pal. At Buffalo Peace Bridge Crossing, a Canadian resident gets testy on his way to purchase motorcycle parts. A Chinese traveller is caught using his cellphone in secondary at Chicago O'Hare International Airport. At the Pacific Highway Border Crossing, a Mexico-bound Canadian has taken steps to avoid a messy situation.

In Port Huron, a strong odour leads to secondary for two Americans. An officer discovers gold at Chicago O'Hare Airport. Travellers follow the letter of the law when questioned in Blaine. An inflatable kiddie pool isn't holding water. A mistake on an African student's visa may get him expelled. A private jet is set for inspection.

At JFK, officers aren't counting on a couple's fluctuating currency declaration. A wandering traveller's pot pipe is discovered in Blaine. CBP officers question a Mexican national with odd travel plans. In Port Huron, a traveller's past may come back to haunt him. A father and his kids are thirsty for some American pop culture. It's the second time in secondary for two Florida-bound Canadians.

An officer suspects a US resident returning from the Caribbean may be hiding something. Two construction workers were out to lunch when they wound up at the border by mistake. A Canadian has to deliver the truth before visiting his pregnant wife and child in the States. A bounty of bogus bills is discovered at Detroit Metro Airport. Two sassy seniors have Georgia on their minds. At the JFK Mail Facility, a package from Belgium is turning heads.

At Detroit Metro Airport, a pregnant Chinese national has CBP asking questions. An airline security breach on the tarmac leads officers to a jet bound for Haiti. After splitting with her American husband, a Ukrainian traveller may have to split with her green card. A package containing suspected narcotics is sent to the Lab for testing. In Port Huron, a traveller's criminal past could cause problems. A parolee gets pulled into secondary.

In Blaine, a Canadian is interviewed under oath after CBP discovers pictures of pot plants on his phone. Without the proper paperwork, it could be curtains for a Venezuelan conductor. In Buffalo, CBP officers inspect a big rig for hidden contraband. At the mail facility in Chicago, officers collect copious amounts of counterfeit goods. A couple is pulled in for a pat down after a canine team detects the scent of marijuana. An officer questions a Sudanese born American who has returned after three months in Africa.

CBP questions a Canadian attempting to enter the US with three of his American family members. An officer has no time for a Swiss traveller's watch declaration. In Port Huron, officers discover baggies of suspected narcotics in a rented vehicle. At Detroit Metro Airport, agricultural specialists sift through plants for invasive species. An American mechanic gets stalled returning home with two engines.

A Nicaraguan traveller wants to visit his American girlfriend but CBP is concerned he may not leave. In Blaine, a traveller's plan to start an e-vape venture may go up in smoke. A couple returning from a Canadian casino could go bust. At the mail facility in Chicago, something's cooking with packets of powdered pork seasoning. Officers drill into a locked box discovered in a traveller's vehicle. In Buffalo, American indie rockers skid to a halt on the road to stardom.

At JFK, officers discover cocaine concealed inside a Caribbean cocktail. A Chinese student hopes to get a pass from CBP after overstaying his visa. Officers suspect a Columbian national is hiding something when questioned in Immigration. At the JFK mail facility, officers sift through packages of pills. A cross-border shopper with a criminal past is re-routed to secondary. A CBP officer isn't buying the declaration of a Chinese clothing designer.

CBP questions a pair of real estate entrepreneurs bound for Florida. In Blaine, a Canadian traveller's US investments are cause for concern. An officer discovers suspect souvenirs in the luggage of a traveller returning from Mexico. At JFK, a US resident's cash declaration is off the money. American license plates registered to a Canadian driver raises questions in Detroit.

At O'Hare International, a returning American's bananas cause a slip-up in secondary. A mother covers for her kid at Detroit's Ambassador Bridge. A car search is brought to a head in Washington State. In Chicago, air cargo officers discover a surprise inside packaged food from China. A flashy handbag requires a second look at JFK Airport.

Officers discover a traveller is driving without a license after he wound up at the border by mistake. A US resident returns from the Dominican Republic with an unusual package. At the Peace Arch crossing in Blaine, two budding entrepreneurs are pulled into secondary. CBP examines the belongings of an American traveller returning from Nigeria. In Chicago, an unknown liquid substance is sent to the lab for testing.

At Detroit Metro Airport, a Japanese traveller must make a difficult decision. An officer discovers something seedy at the mail facility in Chicago. A Canadian bus passenger is busted with bud in her bag. In Buffalo, a detector dog takes out the trash. CBP question a traveller about his homemade accessory.