Legendary country singer Willie Nelson) is accused of murdering his crooked road manager Sonny Cross (David Anderson). Asked by Lt. Disher (Jason Gray-Stanford) to investigate, Monk (Tony Shalhoub) has trouble upholding his objectivity: it seems that Nelson was the favorite performer of Monk's late wife Trudy. Alas, it looks bad for Willie, thanks to evidence provided by a blind woman named Wendy Mass (Jackie Richardson). Meanwhile, Monk's assistant Sharona (Bitty Schram) finds a new boyfriend named Jason--who has a very curious (and highly antisocial!) hobby. Without giving away the ending, it can be noted that the episode's highlight is the climactic guitar-and-clarinet duet between Willie Nelson and Tony Shalhoub. ~ Hal Erickson, Rovi