Some Mothers Do 'Ave 'Em his daughter, also named Jessica; references to Frank's mother suggest that she was very like her son. The final series was written by Allen based on stories by Michael Crawford (not written by Crawford himself as sometimes reported) and made five years after the previous one (although there had been two Christmas specials in between). Frank's character changes noticeably in this series, becoming more self-aware and keen to make himself appear more educated and well-spoken. He develops an air of pomposity which is always best demonstrated when someone would approach and enquire "Mr Spencer?" to which he would always reply,
You Are What You Is Harris adding overdubs and joining the group for Zappa's fall 1980 tour. However, "You Are What You Is" was not released until after "Tinseltown Rebellion" and "Shut Up 'N Play Yer Guitar" although the latter two albums included material from the fall tour. The album also included guest appearances from former band members, including Jimmy Carl Black and Motorhead Sherwood from the 60's Mothers of Invention, as well as the first appearances on record of Zappa's children Moon Unit and Ahmet. Like many of Zappa's albums, some of the tracks are bound together, and the album lacks an overall storyline.