Sir John Franklin set off from England in 1845 with two ships and 129 men to be the first to navigate the Northwest Passage, a new trade route over the top of the world, when Franklin’s ships vanished without a trace. Now, a team of explorers attempts to solve the mystery by retracing Franklin’s route in search of his long-lost tomb. This award-winning series presents compelling untold stories and covers a wide array of provocative subjects. “Explorer” aired for 25 years and was the longest-running documentary series in cable TV history — before being relaunched in 2015 after a five-year hiatus and ran for two more years before stopping. National Geographic brought back the series last year with “Explorer: The Last Tepui”.
