As Marty helps make a deeply interesting discovery on Lot 8, Rick leads members of the team to the Azores where they uncover new ties between Oak Island and the Portuguese sect of the Knights Templar.
In the season finale, Tim enlists Tickle to smuggle tariff-free shine by airplane and rallies a band of fellow outlaws to take back his family's turf. Mark and Digger turn the law against a counterfeiter. Mike and Jerry push Mark Rogers past his limit.