Captain Blackbeard is one of the main protagonists in the film "Blackbeard's Ghost".
In the film's history, Blackbeard had 10 wives, Number 10: Aldetha was a witch. Before she died by burning completely at the stake by Blackbeard, she put a curse on him that he will always be on Earth in limbo unless there'll be a spark of human goodness in him.
200 years later, the new track coach for Godolphin, Steve Walker came to Blackbeard's Inn (which was originally Blackbeard's ship) for a rest for the night. He came to the Inn's Auction of family heirlooms held by the founders of the Inn and descendants of Blackbeard's Bloody crew known as the Daughters of the Buccaneers to save the Inn from the villainous gambler, Silky Seymour. After he had his men scare off the auctionees, Walker got involved in the auction and he won and bought, for $200, a bedwarmer which belonged to Aldetha.
After Walker accidentally sat on the bed warmer and broke it in half, he found her book of spells and a spell that brings his eyes and ears to one who is bound in limbo. Because he said the magic words of the spell: "Kree, Kruh, Vergo, Gaba, Kalto, Kree", Walker could now see "That's right" Blackbeard's ghost. Although, Blackbeard has been annoying Walker like laying on the bed Walker was going to sleep in, doing crazy things while he was sleeping "like talking in his sleep, snoring, and fighting", he couldn't leave Walker alone and had Walker arrested for speeding and drinking while driving.
Walker wanted to help Blackbeard break the curse and so he got an idea, helping the Daughters of the Buccaneers save the Inn. So, Blackbeard stole money from Professor Baker, used for saving the inn to make a bet with Seymour for the Godolphin track team, to help the team win, help Walker and Baker win gambling, and fight off Seymour and his men. After Walker and Baker got the money in time, Blackbeard; whom everyone could now see after Walker had given everyone the spell that allows them to see and hear people who are bound in limbo by telling them to recite it, put the will into the fire and the curse was finally broken. Later, he left Earth and reunited with the spirits of his noble crew.