Factual error: This episode takes place on Frasier's birthday - Martin had ordered a copy of the newspaper published the day Frasier was born and it is sitting on the dining room table when Daphne glances at it and says "Queen Elizabeth's had another baby." - in the Episode The Late Dr. Crane earlier in the same season, Frasier was mistakenly reported as dead on a local TV news show. The dates for his life were shown on the show as 1952-1999. The Queen, in fact, did not have a baby in 1952.
Frasier (1993)
1 factual error in Back Talk - chronological order
Starring: Kelsey Grammer, David Hyde Pierce, John Mahoney, Jane Leeves, Peri Gilpin
Visible crew/equipment: When Frasier is standing through his sunroof to speak with the drivers stuck behind him in the parking garage, one shot shows Frasier's body and much of the rear window which features a very clear reflection of the boom mic.
More quotes from Frasier
Trivia: When Nanette tells Frasier she's tired of playing her children's show character, she asks him if he knows what it's like to play the same character for twenty years. By this point, Kelsey Grammer had been playing Frasier for twenty years: eleven on 'Frasier' and nine on 'Cheers'.
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.