- Dueling Shows: With Crossbones on NBC, another show set during The Golden Age of Piracy, but loosely based on history and starring John Malkovich as Blackbeard.
- Fake Brit: Vane is played by one of the few Americans on the show. You'd never know it.
- The Other Darrin: Roland Reed replaced Jannes Eiselen as Dufresne in Season 2 after Eiselen was diagnosed with brain cancer. Fortuitously, the change in actor roughly coincides with some character development, so the "new" Dufresne looking different is less jarring. Eiselen survived the removal of the tumor, but surgery and recovery prevented him from meeting Season 2's production schedule, and Reed has kept the role since. Eiselen sadly passed away in September of 2016, two days after his 36th birthday.
- Real-Life Relative: Several relatives of the cast appear in secondary roles.
- Mrs. Hudson was played by the wife of Toby Stephens, Anna-Louise Plowman. His brother Chris Larkin also appeared as Captain Berringer.
- Louise Barnes's husband Nick Boraine played Peter Ashe.
Trivia / Black Sails