Creature from the Haunted Sea

During the Cuban Revolution, deported American gambler and racketeer Renzo Capetto (Anthony Carbone) comes up with a get-rich-quick scheme and uses his yacht to help a group of loyalists escape with Cuba's national treasury. American secret agent XK150, using the alias Sparks Moran, has infiltrated the gang which consists of Capeto's brazenly felonious blond girlfriend Mary-Belle Monahan (Betsy Jones-Moreland) and her deceptively clean-cut younger brother Happy Jack (Robert Bean)