First appearance of Mary Jo Catlett as Pearl Gallagher, the third and final housekeeper. She will stay through the end of the series.
With this episode, Mary Jo Catlett joins the cast as a series regular but will not be featured in the opening titles until season 6.
Arnold briefly recalls the events of "Crime Story" when attempting to calm Mr. Drummond's concerns about Kimberly's transfer to Willis' public school.
Arnold complains about coming home Pearl's healthy snack regimen, which he calls "the Scarsdale Diet." The Scarsdale Diet was a bestselling 1978 health book that gained greater notoriety when its author Herman Tarnower was murdered in 1980 by his former lover Jean Harris. The sensational murder and trial were the subject of two television movies.