When Julie plays chess in the park, Eric sets up the board and tells Julie, "It's your turn." It should have been Eric's turn, since he is playing as white, and white always moves first in chess.
When we are seeing Monk talking to the two elderly women coming to mourn their niece, Natalie is in the background behind the elderly women. A few shots later, she has jumped from there to next to Monk.
During the stake-out, Natalie's drink is in one hand, but then suddenly in her other hand.
While Monk is investigating the murder scene, as he kneels near the victim and says that he doesn't know how the man killed her, the "dead" woman's chest can clearly and easily be seen rising and falling as she breathes.
Monk: Payable to… Natalie Teeger.
Natalie: My four favorite words.
Stottlemeyer: What do you know about poison, Mr. Kloster?
Patrick: Not much. More than you, but not much.
Patrick: Do you play chess, Mr. Monk?
Monk: A little.
Patrick: We should play a game sometime.
Monk: We already are.
Monk: I just can't quit. Quitting would be like… giving up.
Patrick: (to Monk) Linda must truly have despised me to bring you into my life.
Czech Republic: February 10, 2010 on TV Nova
Slovakia: November 5, 2010 on Markiza
September 17, 2011 on YLE TV1