Quote from Niles in The Two Hundredth Episode
Niles: Hello, Tom. Tom: Hi, yes. Uh, didn't you fill in on Frasier's show a couple of times? Niles: Oh, yes, actually I did. Tom: Yeah, yeah, you were all right. Niles: Oh, well, you flatter me. Tom: So, what's it like? Niles: Excuse me? Tom: Being Frasier Crane's brother? Being able to talk to him whenever you want, having access to that great brain twenty-four hours a day? Niles: You know, I think I left my lights on.