The French Connection: A research expedition to a French castle reveals new clues, including ancient carvings that could link the Knights Templar to Oak Island. (S5, ep 9)

Echoes From the Deep: Rick and Marty Lagina send divers deep into the Money Pit in search of a mysterious golden object. (S4, ep 9)

Columbus Day: While preparing to send another dive team to explore 10-X, Rick and Marty examine claims that Christopher Columbus can be linked to the Oak Island mystery. (S3, ep 9)

A Dangerous Dive: Rick and Marty send a team of divers into the treasure shaft. Could they be on the verge of solving the centuries-old mystery of the island's loot? (S2, ep 9)

Dan's Breakthrough: New evidence confirms a European presence on Oak Island 100 years before the discovery of the Money Pit. (S5, ep 8)

The Mystery of Samuel Ball: The Lagina brothers find important evidence linking an 18th century American slave to the Oak Island mystery. (S4, ep 8)

Phantom of the Deep: Rick and Marty make an extraordinary discovery in the island's surrounding waters. (S3, ep 8)

Alien Contact: For years, people have claimed to have had direct, personal contact with aliens. The team tracks down some of those who claim to have had such contact. (S1, ep 4)

Underground Alien Bases: The team investigates rumours of human-alien genetic experiments reportedly going on deep below the New Mexico desert in an underground base. (S3, ep 3)

UFO Emergency: Investigation into a huge pulsating light spotted in the sky near Ohio in 1994. A radar operator describes what he saw. (S2, ep 3)