James Woods plays a music professor
The piece Kate plays a few times, and also the one for her piano audition is Chopin's Raindrop Prelude (Op 28 No 15), written in part during a stay he made in a monastery in Mallorca, Spain, in 1838.
The Lawrence's address is 1230 Holland St. in Pasadena, CA.
When Buddy (Kristy McNichol) visits her mother at her office, there is a poster on the wall of The Pirates of Penzance. Kristy McNichol later starred in The Pirate Movie, a parody of Pirates of Penzance.
In reference to her piano playing Kate says "I'm no Rubenstein". Renowned concert pianist Arthur Rubinstein was John Rubinstein's father who played Kate's son in law who was married to her daughter Nancy.