According to many cross-overs, the "Caroline In The City" universe is the same that the "Cheers" universe. However, John Ratzenberger's characters in both shows are different.
Annie: Oh, oh there he is. Places.
Caroline: Annie, maybe you shouldn't.
Annie: Mrs. Karinsky, can we screw with your kid's head?
Natalie: That's usually a mother's job... What the hell - Go for it!
Caroline: You are Richard's mother?
Natalie: Oh, did he tell you I was dead? Usually he tells everyone I'm dead.
Annie: No, he said you live in Utah.
Natalie: Utah? I'd rather be dead!
Guest star Elizabeth Ashley is best known recently for her role as "Frieda Evans" on Evening Shade. And will return as Richard's mother in episode 47 "Caroline and the Bad Trip".