Lieutenant Disher: [over radio] He's never gonna buy this.
Adrian Monk: Dr. Kroger thinks he will. Matthew Teeger has suffered a pure psychotic break. He's in complete denial. His mother never died. Not to him.
Captain Stottlemeyer: The important thing is that we keep him talking.
Lieutenant Disher: What if he has a knife?
Captain Stottlemeyer: He's right. We need a code, a phrase, in case he's in trouble.
Lieutenant Disher: How about, "Mother of God, he has a knife!"?