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.
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.
Answer: Nanny G (Nanette Guzman - played by Laurie Metcaf) has been a children's entertainer for twenty years, and tells Frasier, "Do you know what it's like to play the same character for 20 years?!" The joke is that Kelsey Grammer has been playing Frasier Crane since 1984, when the character first appeared on "Cheers", so Kelsey in real life has been doing just that!
Super Grover ★