Something About Dr. Mary - S7-E16
Trivia: In this episode, Roz is replaced as Frasier's producer for a short time by a lisping character named Chuck Ranberg. This was the actual name of one of the show's writers and co-producers from 1993-1997 - shows from those years list him in the credits.
Trivia: The last 3 initials of the radio station, KACL, are taken from the creators' names, David Angell, Peter Casey, and David Lee.
Trivia: In the party, Frasier is continually interrupted whilst trying to get to know a blonde woman named Eve. Eve is played by Camille Donatacci Grammer, Kelsey Grammer's ex-wife.

Trivia: Lisa Kudrow auditioned for the role of Roz. She had actually appeared before in an episode of Cheers, when she played a character called Emily who was giving Woody acting lessons. Peri Gilpin, who got the part of Roz, also played a reporter in Cheers season 11 - "Woody gets an election."
Something Borrowed, Someone Blue (2) - S7-E24
Trivia: Two endings were filmed for the last episode of season seven, one in which Daphne and Niles ended up together and one in which they didn't. It was then up to the audience to decide which version they liked better.
Slow Tango in South Seattle - S2-E1
Trivia: Although Myra Carter plays Constance Towers' mother in this episode, she's only three years older than Towers.
Trivia: In ep. 1.20, "Fourtysomething", Frasier's admirer Carrie thinks that Bulldog is gay and overcompensating by acting as macho as he does. In ep. 1.24 "My Coffee with Niles", Niles asks Frasier if it means something that he just started using the word "Wow" and Frasier replies that "It means you're a gay man. Your life with Maris was a charade and you should have come out of the closet years ago. Are you going to tell dad or shall I?" In ep. 2.03 "The Matchmaker", Frasier's friend Tom thinks that Martin is gay. These are most likely references to the fact that these three straight characters are all portrayed by gay actors, namely Dan Butler, David Hyde Pierce and John Mahoney.
Trivia: The Cafe Nervosa is supposedly located at the real Seattle intersection of 3rd Street and Pike. Among the four businesses at the corner in real life is a Starbucks.
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.