Treasure hunter Martin Bayerle and his son return to the wreck that nearly destroyed their family, on an expedition to solve the mystery of the RMS Republic and recover a billion dollars in gold.

Martin unravels more of the mystery behind the Republic's treasure. And, during an attempt to recover the gold, a panicking diver has an accident that puts his life in jeopardy and threatens to shut the mission down.

When the ship's generator fails, and a diver's condition worsens, the crew must head back to port. And a devastated Martin recalls his failed 1987 Republic dive and the crushing effect it had on his life.

Martin follows the money trail through history and identifies a mysterious transaction with a Russian banker that may prove the gold is aboard the RMS Republic, while he and the salvage crew return to the wreck and zero in on her bounty.

When a diver gets tangled in the wreck, and another line compromises the ship's propeller, Tim suits up and dives into harm's way. Martin quarrels over the location of the gold chamber. Plus, the shooting that landed Martin in prison is finally revealed.

A dive on the port side of the wreck yields a piece of the past, and a suspicious boat is spotted nearby.

New information is revealed, and questions are answered about the history and mystery of the RMS Republic, her billion dollar gold cargo, and the Bayerle's obsessive quest to recover the bounty and unlock a century old conspiracy.

Grant challenges his father's strategy and forces a new approach to recovering the bounty of the Republic.

The crew makes a run at Republic's treasure, and faces down a destructive storm.

Join treasure hunters as they search for booty in Spanish Galleons that sank over 2,000 years ago. The loot includes gold doubloons and priceless jewelry.

Tale of treasure hunter Robert Marx's long search for a Spanish galleon that contains gold and silver worth tens of millions of dollars.

The Search for Spanish galleon "Our Lady of Atocha," one of several ships that sank in a hurricane in 1622 off the Florida Keys while transporting copper, silver, gold, tobacco, gems, and indigo from Colombia and Panama.

Treasure hunter Martin Bayerle and his son return to the wreck that nearly destroyed their family, on an expedition to solve the mystery of the RMS Republic and recover a billion dollars in gold.

Martin unravels more of the mystery behind the Republic's treasure. And, during an attempt to recover the gold, a panicking diver has an accident that puts his life in jeopardy and threatens to shut the mission down.

When the ship's generator fails, and a diver's condition worsens, the crew must head back to port. And a devastated Martin recalls his failed 1987 Republic dive and the crushing effect it had on his life.

Martin follows the money trail through history and identifies a mysterious transaction with a Russian banker that may prove the gold is aboard the RMS Republic, while he and the salvage crew return to the wreck and zero in on her bounty.

When a diver gets tangled in the wreck, and another line compromises the ship's propeller, Tim suits up and dives into harm's way. Martin quarrels over the location of the gold chamber. Plus, the shooting that landed Martin in prison is finally revealed.

A dive on the port side of the wreck yields a piece of the past, and a suspicious boat is spotted nearby.

New information is revealed, and questions are answered about the history and mystery of the RMS Republic, her billion dollar gold cargo, and the Bayerle's obsessive quest to recover the bounty and unlock a century old conspiracy.

Grant challenges his father's strategy and forces a new approach to recovering the bounty of the Republic.

The crew makes a run at Republic's treasure, and faces down a destructive storm.

Join treasure hunters as they search for booty in Spanish Galleons that sank over 2,000 years ago. The loot includes gold doubloons and priceless jewelry.

Tale of treasure hunter Robert Marx's long search for a Spanish galleon that contains gold and silver worth tens of millions of dollars.

The Search for Spanish galleon "Our Lady of Atocha," one of several ships that sank in a hurricane in 1622 off the Florida Keys while transporting copper, silver, gold, tobacco, gems, and indigo from Colombia and Panama.