The doctor's car is a 1982 Porsche 928, the only front engine V8 model the company made. It was produced from 1977 through 1995.
Jess is portrayed as an average woman that can't get a date with the town doctor. In fact Carol Alt was a supermodel, having posed for magazines such as Sports Illustrated's swimsuit edition. She has appeared in Sports Illustrated a total of 7 times, in Playboy once, and been on the cover of Playboy, People Weekly, Mademoiselle, Redbook, Sports Illustrated, Vogue, and
Cosmopolitan. Alt was about 45 at the time of production and still clearly a beautiful woman, as evidenced by her 2008 Playboy pictorial that took place 2 years after the release of this movie.
Kate and Jess are half-siblings: Carol Alt is nearly 5 feet 11 inches tall, while Amy Jo Johnson is only 5 feet 2 inches tall.