Frasier (Kelsey Grammer) mentions the smoking jacket he gave Martin (John Mahoney) for Christmas in season three's Frasier Grinch (1995).
The celebrity caller in this episode is John Cusack. Cusack plays Greg, a first-year graduate student in psychology who has misdiagnosed himself with every disorder he's studying.
"Córdoba" is said to be the artist responsible for the paintings at the restaurant. "The Córdoba" was the "big sandwich" on Wings (1990), also produced by David Angell.
The production designers were inspired by the paintings of Leroy Neiman, who in the 70s was a featured sports artist in the pages of Playboy. His work was reviled and revered equally by the public and critics.
John Cusack, the celebrity guest caller in this episode, costarred with Frasier cast member John Mahoney (Martin Crane) in the movie Say Anything (1989).