During the filming for her part as Marilyn, Julie Bowen was pregnant with her twin boys for part of her role, as is visible in a couple of scenes when she's wearing the gray cardigan and later in the blue shirt.
Monk's camera is a Kodak Instamatic 134.
The original theme from season one is heard playing over the last scenes.
Natalie is driving a Hyundai Genesis, a significant upgrade from the Nissan Sentra she drove previously.