The episode won an Emmy Award for Outstanding Directorial in Comedy.
This is the only episode in which Murray was Ted's substitute. In addition, it's the only time we see Murray wear a toupee
Ted Knight does not appear in this episode. He is also not present in Keep Your Guard Up (1970) and Enter Rhoda's Parents (1972).
Hamilton Camp (the author Eric Matthews) and Valerie Harper (Rhoda) worked together at Second City in Chicago in the early sixties.
This Episode Aired on Halloween 1970