Blackbeard's Ghost
The eponymous wraith returns to Earth to aid his descendant, elderly Emily Stowecroft. The villains want to kick Emily and her friends out of their group home so that they can build a crooked casino. Good guy Steve Walker gets caught in the middle of the squabble after evoking Blackbeard's ghost.
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Blackbeard's Ghost (1968) is a comedy movie. Starring Peter Ustinov, Dean Jones, Suzanne Pleshette. Rated 6.7/10 on TMDB. Watch it online free on ZapFlix.