Continuity mistake: When Frazier comes into his booth to begin his show, Roz is reading a book. She says "Happy Birthday" to him and we can still see the book in front of her; but in the next shot it is lying on the console next to her, without any time for her to have put it there.
Frasier (1993)
3 continuity mistakes in Back Talk - chronological order
Starring: Kelsey Grammer, David Hyde Pierce, John Mahoney, Jane Leeves, Peri Gilpin
Morning Becomes Entertainment - S7-E19
Continuity mistake: In the initial scene where Frasier is talking to Daphne and Roz in Cafe Nervosa, Frasier can be seen wearing a wedding ring in certain shots. (00:01:10)
Frasier: And though washing one's hands twenty to thirty times a day would be considered obsessive/compulsive, please bear in mind that your husband is a coroner. Thank you for your call, Jeanine. Roz, whom do we have next?
Trivia: John Mahoney plays Kelsey Grammer's father in the series, even though in real life he's only 15 years older than Grammer.
Question: Counting his role on Cheers, Kesley Grammar has played Fraiser for twenty years. Is this the record for the longest portrayal of a character by a TV actor?
Answer: It equals the record of James Arness of "Gunsmoke" for the actor who's played the same part on TV NOT in a soap opera. If you include soaps there are two main contenders - William Roache, who's been playing Ken Barlow in "Coronation Street" in the UK since 1960. Don Hastings has been playing Robert Hughes in US soap "As the World Turns" since 1960 as well.