Legal Tender Love and Care - S8-E6
Audio problem: This does not sound like a case of Frasier stuttering but it sounds like two sets of the same line over top of each other. When Niles sees Donny come into the restaurant, Abby and Frasier just turn to look and Niles exclaims "I said, don't look." - and Frasier says "you - you did not - not". It's as though they forgot to edit out some sound from two different shots.
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 ★