Marty’s fascination is piqued when a fellow energy entrepreneur shares evidence that suggests his Utah ranch has been the Aztec hiding place of Montezuma’s treasure for centuries.

Rick and Marty's good friend and world class wreck diver, John Chatterton, heads south to search for a never recovered Spanish ship off the coast of Florida, and Gary Drayton shares with the brothers his most compelling, and valuable, find ever.

The Lagina Brothers and Matty Blake join the famous treasure-hunting family of the late Mel Fisher in Key West, Florida, to search for millions in emeralds from the legendary Atocha shipwreck.

Oak Island metal detection expert, Gary Drayton joins a relative of Butch Cassidy on a treasure hunt to the legendary robber's roost and unearths a piece of outlaw treasure history.

After personally investing in a treasure hunt off the coast of Florida, Marty Lagina and Craig Tester are thrilled when their search uncovers rare and historical artifacts. But the duo must quickly come to terms with the complicated world of treasure ownership.

Things get dicey when the Laginas deploy Matty Blake to the wild west, where he assists in a dangerous investigation with a local treasure hunter to uncover the secrets of missing Civil War gold.

On the beaches of Tampa, Florida, Marty and Matty dig for treasure believed to have been hidden in the early 1800's by the French pirate Captain Louis-Michel Aury.

Return to the Atocha treaures.

Matty Blake travels to the swamps of North Carolina to help a father and son treasure-hunting team excavate an old mining dredge believed to contain vast riches connected to America's first gold rush.

Marty's childhood dreams are realized when he's invited to join the search for a lost treasure off the coast of an abandoned, and dangerous, island in Lake Michigan.

Matty and Tony re-join the search and excavation of Whydah with Barry and his team in Cape Cod, Massachusetts, near a graveyard of sunken cannons.

Taking a new approach, Rick Lagina and Matty Blake return to Poverty Island in Lake Michigan to search for millions in missing Civil War gold.

The Laginas are astounded to learn that on a trip to Arizona, Gary Drayton may have gotten to the bottom of one the biggest treasure mysteries of all time, one that has resulted in countless deaths and disappearance for those obsessed with finding it.

Marty Lagina and Matty Blake help investigate a mysterious island in Newfoundland where the notorious 17th century English pirate Peter Easton is believed to have hidden millions in plundered treasure.

Matty Blake goes blackwater river diving with firefighter Matt Howell in Virginia to search for the legendary Revolutionary War treasure of British Army General Charles Cornwallis.

When a young treasure hunter tells Rick and Marty he is hunting for the long lost treasure of pirate Jean Lafitte, the brothers are so intrigued they send Matty Blake to assist in a dangerous dive to further the search.

Rick and Marty Lagina look back with Matty Blake on their richest adventures from the past year. (Last-Ever Episode)

Rick Lagina, Tony Sampson and Matty Blake join Barry and Brandon Clifford to search for artifacts and treasure connected to the infamous Whydah shipwreck off the coast of Cape Code, Mass.

Marty and Rick Lagina meet in the War Room with Matty Blake and Gary Drayton to review and discuss the future of the most compelling treasure hunts they've explored so far "Beyond Oak Island."

Marty Lagina and Matty Blake return to the eerie waters surrounding Poverty Island in Lake Michigan to search for a lost Civil War treasure worth an estimated 400 million dollars.

Rick and Marty Lagina, along with Matty Blake, head to Florida and join Gary Drayton to hunt for millions in gold, silver and jewels from the shipwrecks of the famed 1715 Spanish treasure fleet.

Marty Lagina and Matty Blake travel to Kansas City, Missouri, to assist river-boat enthusiast David Hawley as he searches for two 19th century wrecks loaded with lost riches and American history.

The Laginas and Matty Blake help treasure hunters Donna McCauley and Gypsy Jewels search two hideouts in Mineral Springs, Texas where the legendary outlaw Sam Bass is believed to have stashed more than a million dollars in stolen gold.

Matty Blake heads back to Florida's famed Treasure Coast, to team up with professional treasure salvager John Brandon and his team as they dive on the wrecks of the famed 1715 Spanish Treasure Fleet.

The Laginas and Matty Blake offer their help to a team of treasure hunters in Utah, as they search deep underground for billions in gold at a site believed to be the legendary Lost Josephine Mine.