In this observational series we follow the close bond between the Border Agency sniffer-dogs and their handlers who are the vital tool in the fight against smugglers. With its combination of high tension crime-busting and character-led stories, this exclusive series goes on duty at the UK Border with detection officers at airports. It follows the close bond between the Border Agency sniffer-dogs and their handlers, a vital tool in the fight against smugglers. Each dog searches for either drugs, cash, or firearms, and with behind the scenes access and covert cameras, this series captures the drama as our four-legged stars literally sniff-out crimes in action. We then get a unique insight as we follow the questioning, seizure and arrest of smugglers.