The actor playing Paul Arnell (Richard Schaal) was Valerie Harper's (Rhoda Morgenstern) real life husband.
The actor playing Mr. Arnell is only 16 years older than Richard Schaal (Paul Arnell).
Henry Jones plays Mr. Arnell, he would later play Phyllis' father-in-law Judge Jonathan Dexter on "Phyllis" from 1975-1977.
Richard Schaal, who played Paul Arnell in this episode, played Howard Arnell (Paul's brother) in an earlier episode.