Harry Cohn must have wanted to do Captain Pirate and it's predecessor Fortunes of Captain Blood very bad because he had to have shelved out some big bucks to Jack Warner for that footage he used in a flashback sequence in this film. Might have been interesting had he gotten Errol Flynn along with the movie.
Not that Louis Hayward is a bad Captain Blood. Hayward definitely has the swashbuckling élan for the part. But he's up against a rather routine script that's concerned with a case of identity theft.
Somewhere along the line Blood ditched the Olivia DeHavilland character from the Warner Brothers classic and in the Fortunes Of Captain Blood wooed and won the daughter of Spanish don, Patricia Medina. Now wedding bells are ringing, but when one of His Majesty's representatives, John Sutton, who also has a hankering for Pat brings news that Blood has led a raid on Cartagena and among other things stolen some valuable jewelry, it looks like Hayward is back to his old pirate ways.
In fact that becomes something of a wish fulfillment for Sutton, because Hayward in order to prove his innocence has to round up his old crew and steal a ship, Sutton's ship to be precise, and roam the Caribbean in search of the impostor. During the search he uncovers some treason as well. Great Britain and Spain were allies at this time during the 1690s and the French would like nothing better than to tear this alliance apart.
Hayward and Medina make a beautiful pair of hero and heroine. Hayward's Blood is not as dashing as Errol Flynn's, but he does make up for it with being very cunning. Still the results are rather predictable and if you haven't figured out who the bad guys are, you haven't seen too many pirate movies.