Quote from Martin in Mother Load (Part 1)
Martin: Well, we knew she wouldn't be around forever, but I never would've guessed she'd end up with Niles. Frasier: I know. He's come so far since the dark days of Maris and Mel. Martin: Well, I guess from now on it's just you and I. Frasier: You and me, Dad. Martin: This is gonna be great.