Hy Averback Director Zero Mostel Rev. Pious Blue Actor Kim Novak Sister Lyda Kebanov Actor Clint Walker Ranger Ben Quick Actor Claude Akins Slade Actor Akim Tamiroff Papa Actor Larry Storch Juan Actor John Anderson Mayor Kincaid Actor Sam Jaffe Brother Lilac Bailey Actor Mako Secret Agent Fong Actor Elisha Cook Jr. Jeb Actor Ruth Warrick Mrs. Applebee Actor John Fiedler Brother Dismas Ostracorn Actor John Larch Sheriff of Friendly Actor Peter Whitney Brother Jordan Cass Actor Norman Alden The Great Gregory Actor Guy Wilkerson Glazier Actor Burt Mustin Glazier Actor Grady Sutton Rev. Simms Actor Malcolm Stuart Producer William Peter Blatty Screenwriter Nelson Riddle Original Music Fred J. Koenekamp Cinematographer Gene Milford Film Editing Jack Poplin Production Design William L. Kuehl Set Decoration Moss Mabry Costume Design