Chris Larkin (Berringer) and Toby Stephens (Flint) are brothers. Their parents are Dame Maggie Smith and Sir Robert Stephens. Anna-Louise Plowman (Mrs Hudson) is Toby Stephens's wife.
While this serves as a prequel to "Treasure Island," the characters of Captain Charles Vane, Jack Rackham, Edward "Blackbeard" Teach, Israel Hands and Anne Bonny were actual pirates in history that operated in the Caribbean during the Golden Age of Piracy.
Jack Rackham originally came up with the commonly known "Jolly Roger" flag design that is shown in the show.
Captain Flint's ship "The Walrus" was actually built on set for the show.
Long John Silver was in Treasure Island and lost his leg from a broadside on Capt. Flint's ship. Also Long John Silver's parrot's name was Captain Flint.