Monk
Mr. Monk and the Captain's Marriage
S4 E12:
Monk and Natalie join Captain Stottlemeyer at a junkyard to investigate the murder of a small-time drug dealer named Chicklet. While Monk looks around, a cocky young police sergeant named Ryan Sharkey implies that he's having an affair with the captain's wife, Karen. Stottlemeyer punches Sharkey in the face, and then leaves in a huff. Karen emphatically denies having the affair. The captain, still suspicious of Karen, asks Monk to follow her and find out whether or not she's having an affair.
Starring
Nicky Katt, Misha Collins, Kitty Swink