The Spearhead Conspiracy

S2, E13: In 1200 AD at the same time the Vikings were discovering North America along the East Coast, new evidence suggests another group of intrepid voyagers may have been discovering the New World on the opposite end of the globe. When an obsidian spear point of mysterious origins is discovered by a group of hikers on the island of Maui, Scott Wolter is called in to investigate. Delving into it's origins, he discovers the artifact may have come all the way from Mexico--and is just one more clue in a mounting pile of evidence suggesting Polynesian voyagers made it there and back. What Scott wants to know is if they made it to Central and South America, could they have made it all the way to North America?