Thirteen of Hollywoods horror classics in detail: Dr. Jekyll and Mr. Hyde (1931), The Old Dark House(1932), The Mask of Fu Manchu (1932), Mark of the Vampire (1935), Mad Love (1935), The Black Room (1935), The Walking Dead (1936), Cat People (1942), Bluebeard (1944), The Lodger (1944), The Picture of Dorian Gray (1945), Hangover Square (1945) and Bedlam (1946). From original interviews and research, the styles of the various studios (from giant M-G-M to Poverty Rows PRC), along with the performers, directors, and backstage events, are examined.