Crossbones

The Longitude Chronometer, a device that will change the world, is stolen from HMS Petrel by pirates working for the legendary but supposedly long dead Edward Teach - better known as Blackbeard. On board the Petrel is Tom Lowe, an English spy working undercover as ships surgeon. Lowes mission is to prevent the Chronometer from falling into the hands of pirates... and if the opportunity should arise, to assassinate Blackbeard.

When Kate is captured on a trading voyage, Blackbeard and Lowe must work together in order to rescue her before she reveals the islands whereabouts to William Jagger. In the process, Lowe discovers that Blackbeard has an ulterior, deeply personal motive for keeping him on Santa Compana.

Lowe plots to kidnap Blackbeard and deliver him to the English authorities, believing this to be the only way to save the people of Santa Compana from the mad wrath of William Jagger. Meanwhile, Jagger visits an insane asylum, believing a patient there will be the key to finally defeating Blackbeard.

Nenna plans an escape, putting Lowe in peril. Meanwhile, Balfour forms an unlikely alliance that could cost him and Lowe their lives.

Blackbeard risks everything against William Jaggers frenzied attack in the season finale. A torn Lowe must make crucial choices.