Frasier, Season 9

[Frasier is obsessing over the absence of one tape from his collection.]

Frasier:
That's it. I'm quirky. I'm delightfully quirky.

Niles:
Do you realize that your delightful quirk has brought your life to a standstill?

Frasier:
Niles, I've just finished my two thousandth show. I'm exhausted, physically and emotionally. I believe that I am entitled to an entire weekend of doing nothing, don't you?

Niles:
Do you know you have your pyjamas on backwards?

Frasier:
Another delightful quirk of mine.

Niles:
Not from where I'm sitting.

[When Frasier gets a lead on a missing tape.]

Frasier:
I'll put on some pants.

Niles Crane:
Zipper goes in front.