Count Orsini-Rosenberg, Emperor Joseph II and Antonio Salieri are characters in which play and film?

Count Folke Bernadotte, a diplomat and nephew of King Gustav V, was assassinated in 1948 while serving as a UN mediator… Count Dooku, Mace Windu and Chancellor Palpatine are characters in which film saga? Count Grigory Orlov helped lead the 1762 palace coup that placed which empress on the Russian throne? Which verb means to count off or list items one by one? Which word describes something countable, with an end or limit? Countee Cullen and Langston Hughes were part of which 1920s New York cultural movement? Con artist and art forger Neal Caffrey helps the FBI catch criminals in which USA Network series? In what year did Christopher Columbus return to Spain from his first voyage?