Frasier promised Frederick a tour of Microsoft, which would be Microsoft headquarters, located in Redmond, Washington, very close to Seattle.
Frasier says Frederick is 8. Frederick was born November 1989, so at this point in time he should only be 7.
Roz: All right, there's a guy on second, one guys' out, I drive one to the gap. The throw to the cut-off man is late, our guy's safe at home, and I try to stretch it to a double. I make a beautiful hook slide right under the tag. How can I be out?
Frasier: I'm still trying to understand why you drove to the Gap in the middle of the game.
Niles: (to Frederick) You can fool the others but you can't fool me. I'm on to you, little man!
Episode Title: The Unnatural
The title is derived from The Natural, a 1984 film starring Robert Redford about an aging baseball player.