Lisa, one of the lawyers that Carrie goes out to dinner with, is played by the same woman who plays Carrie's mom in the season 1 finale "Maybe Baby". She is shown giving birth to Carrie in the flashback scene with Arthur.
The Doug & Carrie song uses the basic tune from Henry Mancini's "Peter Gunn." The piece was used as the main theme for the 1960 television show of the same name. It gained fame again years later when it was used in the film "The Blues Brothers" (1980).