One of Seven: The Laginas and their partners make incredible discoveries at Smith's Cove and in the Money Pit. (S4, ep 13)

Secrets and Revelations: In the season three finale, the Lagina brothers finally get results from borehole 10-X, while The Money Pit also yields an exciting discovery. (S3, ep 13)

A Key to the Mystery: A skeleton key and maps from Fred Nolan's archives open a new door in the Laginas' quest. (S5, ep 12)

Hyde Park and Go Seek: Rick and Marty decide to dig a third hole at the Money Pit after Rick finds even more evidence connecting Oak Island to the Knights Templar. (S4, ep 12)

Voices From Below: The explorers finally reach the bottom of borehole 10-X, while a whole new void is discovered deep in the Money Pit. (S3, ep 12)

Moving Targets: Further investigation suggests a link between the mysterious medieval cross and the Knights Templar. (S5, ep 11)

Presidential Secrets: Rick Lagina travels to the Franklin D. Roosevelt library to find out why the former US President was obsessed with Oak Island. (S4, ep 11)

Sword Play: The brothers retrieve some interesting lab results from the mysterious sword they found, before following another lead North of the island. (S3, ep 11)

The Signs of a Cross: The team unearths a ship's log detailing the burial of treasure on an island eerily similar to Oak Island. (S5, ep 10)

About Face: The Oak Island team returns to borehole 10-X in search of new clues. (S4, ep 10)