Billion Dollar Wreck

Fifty miles off the coast of Nantucket lies the RMS Republic and her secret treasure. A famed White Star liner, the Republic set sail three years before the Titanic, and met a similar fate at the bottom of the ocean. As soon as the Republic sank, rumours spread of a precious cargo, but the Republic has kept her secrets intact for over a century. Until now. Life-long treasure hunter Martin Bayerle has devoted 35 years of his life to researching the Republic and proving the existence of her reputed cargo of 150,000 American Eagle gold coins. The quest to recover the gold is a siren's call he's answered before. In 1987, Martin raised millions of dollars for an expedition to recover her gold, but searched the wrong section of the massive vessel and came home empty-handed. The failure left Martin broke, embroiled in lawsuits, estranged from his wife, and eventually landed him in prison. Despite this, Martin's obsession with the Republic only grew stronger. Now, with the help of his estranged son Grant, Martin is returning to the Republic for one last shot at the gold. (History Channel)