A bag gives a massive hit for cocaine in Bristol; surveillance officers eavesdrop on a cannabis gang; suspects in Gatwick who have previously been convicted of smuggling drugs inside of live dogs.

In Bristol, officers receive an anonymous tip-off about two cocaine smugglers arriving from Amsterdam. And officers aboard the fast cutter Searcher receive an angry welcome when they board a suspicious yacht off Cornwall. In Dover, officers searching under a truck find an illegal immigrant hiding dangerously on top of the engine.

Today, in Bristol, customs officer Joe stops a couple returning from Spain with 8,000 cigarettes in order to confirm that the cigarettes are for pair's personal use, but communicating with the man proves challenging. Customs hits the jackpot when the Specialist Rummage Team finds a ton of cannabis concealed in a truck in Dover, and an intimate search gets to the bottom of a suspected heroin smuggler at Gatwick.

The crew of the cutter Searcher are on patrol off Cornwall when they spot a lone yacht sailing from the Canaries - a frequent transit point for cocaine. In Dover, a giant X-ray helps officers tackle industrial-scale smuggling in the thousands of trucks which pass through the port each day. In Bristol, a man coming from Turkey is caught with 5,000 cigarettes - well over the limit - and reacts angrily when told he's going to lose the lot.

In Bristol, customs officer Ann catches three passengers with 87 kilos of tobacco worth thousands of pounds, but will the smuggler be able to control his temper? The crew of customs cutter Searcher board a vessel to check for drugs. Sniffer dog Rosie picks up the scent of a suspected drug smuggler at Gatwick.

A passenger caught at Bristol airport with too many cigarettes admits to having done it for years. The crew of fast cutter Searcher investigate mysterious pot-markers off the Cornish coast. The Gatwick baggage X-ray picks up something suspicious as it passes through Customs.

Today, an anonymous tip-off leads to Bristol officers paying a visit to suspected cigarette smugglers. At Gatwick, Customs catch a cocaine smuggler red-handed, and when he confesses that he's being met by an accomplice, officers lay a trap to catch his cohort. And, a suspiciously clean car arouses suspicion in Portsmouth.

A man who is caught smuggling cigarettes in Bristol lands in hot water when he is caught lying. Badger the sniffer dog picks out a suspicious suitcase in Gatwick. New officer Mark is convinced he is about to make his first cocaine seizure when he pulls over two women who have been to the Caribbean.