Bradley Whitford is the celebrity caller in this episode. He plays Stu, whose afraid to give up his freedom when his girlfriend wants him to move in, get more serious.
In the opening scene, Frasier complains that there is no place for him at the Yo-Yo Ma Orchestral Fantasy Camp again this year. Yo-Yo Ma was a guest caller to Frasier's radio show in the sixth season episode Dr. Nora (1999)
This episode is another example of how television series were not broadcast in the same order that they were produced. Roz spends entire days and nights out partying with Jen, yet no mention is made of her daughter Alice. In other episodes Alice goes from being six, to being a toddler, and back again.