In what episode of the nanny does CC go insane?

In "The Nanny," C.C. Babcock goes a bit off the rails in Season 5, Episode 18, titled "The Honeymoon's Over." In this episode, she becomes increasingly obsessed with her feelings for Mr. Sheffield and her jealousy over his relationship with Fran. Her antics and over-the-top behavior highlight her emotional turmoil, leading to comedic moments that showcase her character's quirks.