Crossbones (2014)

S1E6 A Hole in the Head

Balfour catches Lowe admitting to Kate that he is an English agent assigned to eliminate Blackbeard. He quickly informs Selima, who dispatches pirates to track down Lowe. Meanwhile, Antoinette endures further torment from Jagger, who now employs Lowe's sketchbook as proof that Edward "Blackbeard" Teach is still very much alive.