In Mr. Monk and His Biggest Fan (2007), when Marci gives Monk a drink of water at her home, he asks "is this my glass?" She explains that it was previously his, and his lamp and his pants... and punctuates the story with "Don't worry; not crazy, just a fan."
In Mr. Monk's Favorite Show (2009), Monk meets the star of his favorite childhood show and explains to her that, while he has seen the show only once when it was originally aired thirty years earlier, he has them all memorized. He punctuates the story with "Not crazy, just a fan."
When Christine Rapp is approached at the hotel by her supposed stalker Stan the fan, he is wearing a hooded sweatshirt from the fictitious football team The Condors featured in Mr. Monk Makes the Playoffs (2009). This is not seen until the flashback / 'here's what happened' segment during Monk's 'dream' of being part of the Cooper Clan.
Salvatore Savo, Nathan Perkins, and Sheryl Johnson (as Sheryl Johnson-Poelking) are Associate Producers of both Monk (2002) and The Cooper Clan.
The Safari Inn (1911 West Olive Ave., Burbank, CA), where Christine Rapp checks herself in, has been used in many films including True Romance (1993). It was also featured on the TV show Lethal Weapon (2016) (in 2018-2019) as the motel where Seann William Scott's character Wesley Cole is living.
The episode of "The Cooper Clan" in which Cathy Cooper becomes a safety monitor is a parody of Law and Disorder (1973).