At the funeral home when the Rabbi (Alan King) is delivering the eulogy, he references living one's life as James Bond. The next shot is of Joseph Wiseman, who played the title character in Dr. No (1962), the first Bond film.
George Segal (Morroe Rieff) and Jessica Walter (Inez Braverman) died only one day apart: Segal on March 23, 2021 and Walter on March 24, 2021.
Alan King worked with Sidney Lumet after this film, appearing in The Anderson Tapes (1971) and starring opposite Ali MacGraw in Just Tell Me What You Want (1980). King also made a few-second cameo in Prince of the City (1981).
Although screenwriter Herbert Sargent was usually billed as "Herb," for this film he opted to use "Herbert."