Quote from Daphne in Cheerful Goodbyes
Niles: Frasier? Frasier: Hmm? Niles: If we're going to make our reservations, we're going to need to leave now. Frasier: Oh, is it that time already? Niles: Already? If I hear one more of that postman's crackpot theories, my head will explode. Frasier: Oh, Niles, don't worry about him, nobody takes him seriously. Daphne: [o.s.] I never knew there were so many letters in the dolphin alphabet.