Howard Avedis Director, Producer Bo Hopkins Carl Actor Dianne Hull Kelly McIntyre Actor Patti D'Arbanville Cathy Actor Sharon Farrell Melanie Actor Mel Ferrer Dr. Sidney Coleman Actor Julie Adams Nurse Hannelord Actor John David Carson Ronnie Denton Actor Patti Brooks Disco Singer Actor Robert Englund Benny Actor Michael Adams Screenwriter Marlene Schmidt Executive Producer Daniel Pearl Cinematographer Stanford C. Allen Film Editing Alan Silvestri Original Music Chuck Seaton Art Director