The show returned on November 4, 2003 with a one hour episode, "Goodbye," dedicated to Ritter's death.
Subsequent episodes dealt with the family's reaction to his death and their moving on.
On September 11, 2003, following an interview on the set with the Museum of Television & Radio, John Ritter suffered an aortic dissection.
In the two episodes in which Maggie appears, the pair play out an adult version of the Hennessey daughters.
First of all, Cate would represent Bridget and Maggie would represent Kerry. From Maggie's first appearance, Cate and Jim frequently talk about the sibling relationship as if Cate was the Bridget type.
However, the episode did not affect the ratings in any notable way.
In the episode "The Doyle's Wedding" (s01e26), former Cheers stars (John Ratzenberger & Shelley Long) appear as the Doyle family at their daughter's wedding.
Ratzenberger guest-starred in three episodes, again playing Fred Doyle, the Hennessys' pesky and annoying neighbor.