Lieutenant Disher: Here's the report on the murder weapon. You know, the firing pin was worn down. That's why it wouldn't fire.
Captain Stottlemeyer: Maybe we should call Monk in on this one.
Lieutenant Disher: Oh, yeah, I already called him. He's not available. He's having some kind of problem with Hal.
Captain Stottlemeyer: [scoffs] Hal. I still can't figure that one out. [turns the gun around in his hand] Are you thinkin' what I'm thinkin'?
Lieutenant Disher: ... No.
Captain Stottlemeyer: When you showed this gun to Hal and said, "Here's the murder weapon," he knew that the killer used it like a club.
Lieutenant Disher: That's right, he pointed to the cracked handle.
Captain Stottlemeyer: But we never told him how Tim Hayden died. You show anybody a handgun and say, "This is the murder weapon," they're going to assume that the guy had been shot.
Lieutenant Disher: How did he know?
Captain Stottlemeyer: How did he know?