Quote from Marci Maven in Mr. Monk and the TV Star
Marci Maven: Oh, you are the greatest detective in the world. You are the greatest detective in the universe. You should have your own show! Adrian Monk: No. No, I'm... Marci Maven: You should. You have to promise me something. Will you promise me something? If you ever do get your own show, you have to promise me that you will never change the theme song. Okay? Adrian Monk: I promise. Marci Maven: That's the only thing. You promise? Adrian Monk: Sure. I promise. Marci Maven: You promise? Adrian Monk: Good night. [The original Monk theme tune plays as the credits roll]