Mr. Monk and the Class Reunion - S5-E6
Question: In this episode, Monk discovers that Kyle intends to murder his wife Dianne and then make it look like suicide. Why would he do that? I've watched the whole episode and still can't figure out the reason.
Answer: You can hear Kyle talk to his "mistress" on the phone when he is at the ice cooler in the hotel, thereby making it clear he has an "extramarital" affair, thereby outing his motive to get rid of the wife who brought the money into the marriage...plus her life insurance, supposedly.