 Dr. Hibbert makes his first appearance on the series in the episode . In Kogen and Wolodarsky 's original script for " Bart the Daredevil " , Hibbert was a woman named Julia Hibbert , who they named after comedic actress Julia Sweeney ( Hibbert was her last name , through marriage , at the time ) . When the Fox network moved The Simpsons to prime time on Thursdays to compete against the National Broadcasting Company 's ( NBC ) top @-@ rated The Cosby Show , the writing staff instead decided to make Hibbert a parody of Bill Cosby 's character Dr. Cliff Huxtable . 
