Frasier mentions that Hirsch and Sons bookstore in Seattle had been visited by Mark Twain. The bookstore was fictional, but Twain did visit Seattle in 1895, his only trip to the Pacific Northwest, as a part of a worldwide speaking tour.
This is the only episode in which Kelsey Grammer does not sing the theme in the closing credits. It is sung in Spanish by Kenny O'Brien. This is also the first time it is sung in a different language.
No "Thanks for Calling" during the end credits, even if it is a season finale.
The celebrity caller in this episode is John McEnroe who plays Patrick, a caller who thinks his wife is having an affair.
This is Tom McGowan's first appearance as new station manager Kenny Daly. He will be the only station manager to have an ongoing screen presence, become intertwined in the lives of all the characters, and remain manager until the end of the series.