When Susan Saint James became pregnant during the show's fourth season, it was not written into the show because her character was single. She was filmed either with strategically placed props or by having her character Kate recovering from a broken leg. However, in a flashback episode that took place when Kate and Allie were younger and they were pregnant with their daughters on the show, St. James was allowed to show her pregnancy.
Both Curtain and Saint James were hesitant about doing a weekly sitcom. Saint James was married to NBC executive Dick Ebersol and lived with her family in New York. Curtain, similarly a new mother, also lived with her family in New York. Both actresses did not want to relocate to Hollywood for the series. CBS offered to tape the show in New York which is what enticed both actresses to sign on. The series would tape at the famed Ed Sullivan Theater.
Kelsey Grammer's debut
John Loeffler, who sings the signature theme song at the end of the show, appears as a piano teacher in the second season episode "Piano Lesson." He sings a few other songs during the course of the episode, in addition to the regular end theme.
Jane Curtin and Susan Saint James previously starred together in the movie How To Beat The High Cost Of Living.