The Curse of Oak Island - 3 ª Season

As Rick and Marty Lagina return to Oak Island, they discover that not only does borehole 10-X contain even more secrets than previously thought, but a new technology could prove that there are numerous treasure sites lying all over the island.

After scanning sonar has corroborated Dan Blankenship's long held belief that a chamber 235 feet down 10-X may contain wooden posts, side tunnels, a chest and even human remains, Rick and Marty Lagina along with their partners begin clearing the shaft of obstructions to allow divers to safely explore it.

Rick and Marty Lagina bring heavy digging equipment to the island and their first target is where a researcher claims the treasures of the Knights Templar lie buried.

After finding the original Money Pit, Rick and Marty Lagina look at an ancient stone carving that may help prove that Portuguese explorers with connections to the Knights Templar are behind the Oak Island Mystery.

While prepping for a diver to explore the bottom of 10-X, Rick and Marty Lagina arrange to send an ROV camera down the shaft, which reveals evidence that could threaten their entire operation.