When does Black Sails return?

Black Sails is an American historical action-adventure television series set on New Providence Island. It was written to be a prequel to Robert Louis Stevenson's 1883 novel Treasure Island. The show depicts treasure-seeking pirates in their attempt to establish a Republic of Pirates. Real life pirates who are fictionalized in the show include Anne Bonny, Benjamin Hornigold, Jack Rackham, Charles Vane, Ned Low, Israel Hands and Blackbeard.