I've been rewatching Monk, and something that really struck me is how much of the plot is based on coincidences, and it really makes it easy to pick out the killer. I was watching an episode where Captain Stottlemeyer mentions offhand an unsolved murder at a golf course, and later on someone Monk is talking to has a golfing trophy. Immediately knew it was him because golf had been mentioned twice and this show never wastes a Chekhov's gun, or tries very hard to misdirect. I remember saying "I don't know why yet but it's him."