Monk - Season 1, Episode 12: Soundtracks

(0:26) Adrian gets suspicious over the fact that Mrs. Chabrol cannot speak French anymore, gets up to visit some of the passengers he suspects, and ends up getting locked inside the aircraft restroom.

(0:32) Monk sees Mr. Chabrol's shoes, wonders why he had them polished just before the flight, and tries to have a look at them without getting caught. (similar to the Keys/Casket situation in S1E1)