Melville Shavelson Director, Screenwriter Jack Lemmon Peter Edward Wilson Actor Barbara Harris Theresa Alice Kozlenko Actor Jason Robards Stephen Kozlenko Actor Herbert Edelman Howard Mann Actor Lisa Gerritsen Linda Kozlenko Actor Lisa Eilbacher Linda Kozlenko Actor Severn Darden Dr. Harris Actor Danny Arnold Screenwriter, Producer Charles F. Wheeler Cinematographer Frank Bracht Film Editing Marvin Hamlisch Original Music Stan Jolley Production Design Robert R. Benton Set Decoration Michael McLean Casting