. . . "An unseen man" . "Billy (''Black Christmas'')" . . . . . . "Billy (Black Christmas)" . . "Billy Lenz" . "Billy / Phone Voice" . . . . "Billy" . . . . . . . . "(1974)" . "Eugene" . . . . . . . . . . . . . . . . "Black Christmas" . . . . "William \\\"Billy\\\" Edward Lenz
" . "Billy (Black Christmas)" . . . . . . . . . . . .