As promised, here is the answer to the CarTalk Puzzler, “How the Dispatcher Saved the Day“:

RAY: Here’s the answer. Now this isn’t 100% guaranteed that it’s going to work, but it’s the only thing that would work. What she asked him to do was to give her the license plate number of the car that he’s parked behind.

TOM: Ah.

RAY: She was figuring that the owner of the car lives right there.

TOM: Sure. It’s a residential neighborhood, and it’s late at night.