My favourite season 4 (and quite possibly all the seasons) dialogue comes from "Daphne Hates Sherry"

FRASIER: I think what it all comes down to is a dispute over turf. Daphne and Sherry are like two animals scent marking their territory, which in this case is you Dad.
MARTIN: You couldn’t come up with a less disgusting comparison?
FRASIER: All right, all right, fine. It’s like the Roman emperor Tiberius, his mother Livia and his wife Vispania.
MARTIN: What?
SHERRY: Huh?
DAPHNE: Who?
NILES: Go on.

To me, it says so much about Frasier and Niles in a really clever way. Beautiful.

I love "Daphne Hates Sherry"!

But, ehem, my favorite parts involve Niles and Daphne in an apartment without air conditioning! Hehe!


"To Kill A Talking Bird" is great, too!