Follows the work of US Customs and Border Protection (CBP) officers and agents as they clear travelers at land, air and marine ports of entry, inspect cargo and .br br br br br br Follow the work of the men and women who protect Canada's borders. Border Security Canada Season 3 ep 10 11 12 13 14 Canada's Front Line. Border .br br Follows the work of US Customs and Border Protection (CBP) officers and agents as they clear travelers at land, air and marine ports of entry, inspect cargo and .