Supernatural frights abound in this horror double feature. The Passing centers on a serial killer who avoids execution by agreeing to be a scientific guinea pig -- a grave decision that reveals the spellbinding fate of mankind. James Plaster stars. In Beyond Evil, a couple unwittingly bunks in a mansion occupied by the ghost of a voodoo witch. The evil spirit goes on a killing spree and eventually possesses the woman. Lynda Day George stars.