At the crime scene, Natalie takes off the flower Monk attached to his coat before having a small talk with him. During the conversation, for a brief moment the flower is attached to Monk's coat, and the rest of the talk she has it in her hand.
After the bartender walks away (following Monk's unsuccessful attempt at bribing him), Natalie's left hand changes position with a slight change in camera angle.
During the scene where Natalie shows up at Monk's apartment with a new digital camera, and then berates Monk for his desire to continue to follow Marilyn Brody, she is wearing her hair in a ponytail. Yet in subsequent scenes set that same day (judging by the fact that her clothing does not change), she isn't wearing her hair this way.
During the show Monk states that 40 years have passed since when Roderick Brody gave him swirlies. However, later on in the episode, in the interrogation room, Roderick asks Monk why he is bringing up a matter that had happened 30 years ago.
Adding sea salt to tap water to make it look like someone drowned in the bay would not have worked. First of all, the bay would probably have numerous impurities that the tap water wouldn't have even with the sea salt added to it. Secondly, most tap water has chlorine in it, whereas bay water usualy does not.
Natalie: Let's just hear what he has to say. If you're not comfortable, we'll leave. I promise.
Monk: I'm not comfortable.
Natalie: She seems nice. How bad could her husband be?
Monk: It doesn't always work like that. Eva Braun took in stray puppies, for god's sake.
Brody: I heard you went a little crazy since we graduated. Now I just need to know. Is it funny crazy or sad crazy?
Natalie: Funny crazy.
Monk: Sad crazy.
Stottlemeyer: So identical twins, huh. That's one for the books.
Disher: Yeah, I'm pretty sure I said twins.
Stottlemeyer: Randy, you always say twins.
Monk: Don't you hear that? The toilet tank refilling. Toilet tank of life.
Natalie: Come on, Mr. Monk, I'll drive you home.
Monk: It's what Plato called the great cosmic swirly. There's no escaping it.
Natalie: Plato said that?
Monk: I'm paraphrasing.
Czech Republic: February 26, 2010 on TV Nova
Slovakia: November 24, 2010 on Markiza
Finland: December 10, 2011 on YLE TV1
On the episode's premiere, the cast appeared in a commercial against heart disease, citing Stanley Kamel's death of a heart condition.
On the episode's premiere airing, the end credits from "Mr. Monk and the Lady Next Door" were used.
Noah Emmerich is billed as Special Guest Star.