The nineteenth season featured the returns of several characters from previous seasons. Kelsey Grammer made his tenth appearance as Sideshow Bob, and David Hyde Pierce made his second as Bob's brother Cecil Terwilliger in "Funeral for a Fiend".
The 19th season marked the comeback of several beloved characters from earlier seasons. Kelsey Grammer once again played Sideshow Bob, this time for his tenth appearance, while David Hyde Pierce brought to life Cecil Terwilliger's sibling in "Funeral for a Fiend".