National Geographic: Treasures of the Deep (2000)

Join Titanic discoverer Dr. Robert Ballard and his team on a new undersea expedition! Deep beneath the Mediterranean Sea lies a world of mystery and lost treasure. But the right to these ancient Roman ships, Spanish galleons, and luxury liners is fiercely contested. Dr. Ballard and his experts embark on a remarkable maritime expedition to find and study these shipwrecks half a mile underwater. Meet two generations of treasure hunters who risk everything to find and sell silver, gold, and other riches from the ocean floor. You'll encounter explorers and archaeologists who profit from their discoveries as they uncover the great treasures of the deep.