Cassandra Peterson co-wrote and starred in a 1988 film about which "Mistress of the Dark"?

Pellagra cases began declining in the 1940s when breads and cereals were fortified with which vitamin? Major leaguer Casey Candaele's mother, Helen Callaghan, played pro ball too, helping inspire which 1992 film? Casey Jones and Choo Choo Charlie were famous what? Casper Van Dien played a young soldier battling giant bugs in which 1997 film? Cassius Clay, playing himself, ends the career of boxer Mountain Rivera in which 1962 film? Castle Clinton in New York City was originally a fort, renamed in 1815 for which mayor? The British royal family's surname, adopted in 1917, comes from which castle? "Castle Richmond" (1860) is a novel by which author of "Barchester Towers"?