Sid Melton, who played the Fool, also played Salvatore Petrillo, Sophia's late husband and Dorothy's father, on seven other episodes.
Bea Arthur and Hal Linden were both stars of their own shows in the 1970s. Arthur starred on Maude as the titular character, and Linden did the same on Barney Miller. The two actors had known each other since at least 1981 and stayed friends for many years after.
The song that the Minstrel sings whilst Dorothy is on her date is the theme tune to 'Gilligan's Island' (1964-7).