Ralph Nelson Director, Screenwriter, Executive Producer Billy Dee Williams Homer Smith Actor Rachel Ward Actor Maria Schell Mother Maria Actor Fay Hauser Janet Owens Actor Judith Piquet Sister Agnes Actor Hanna Hertelendy Sister Albertine Actor Lisa Mann Sister Gertrude Actor Bob Hastings Harold Pruitt Actor Sam Di Bello Dr. Mike Robles Actor William E. Barrett Screenwriter John McGreevey Screenwriter Jack N. Reddish Producer Toby Martin Producer Robert B. Hauser Cinematographer O. Nicholas Brown Film Editing George Aliceson Tipton Original Music Hub Braden Production Design, Art Director Donald J. Remacle Set Decoration Dyke Davis Costume Design Ruth Conforte Casting