Trivia: When Bulldog calls up Frasier and asks him if he can sing a bit, Frasier stars singing the Gilbert and Sullivan song "Three Little Maids from School" which of course leads to great embarrassment. In the episode "Cape Fear" from The Simpsons, Kelsey Grammar guest stars as Sideshow Bob and also has bad luck with Gilbert and Sullivan music. Bob gets badly injured after the family sings the Three Little Maids song. Later he is asked to sing the score from the HMS Pinafore and it foils his plan.
It's Hard to Say Goodbye If You Won't Leave - S3-E10
Trivia: Frasier's relationship with Kate was supposed to last longer, but Mercedes Ruehl decided that she did not want a weekly sitcom role at the time.
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.