When Charlie is telling his version of the story, Nate Mooney (Ryan McPoyle), accidentally pours milk on Dee. When this happens, Jimmi Simpson, who plays Liam McPoyle, has his head fully turned from the camera as he is visibly laughing
When trying to find out who had sex with Dee during the Halloween party, she is visibly pregnant.
While trying to figure out who got Dee pregnant, Dennis while wearing the Luigi costume convinces Charlie to swap costumes with him. Charlie Day would go on to voice Luigi in the new animation/comedy "The Super Mario Bros. Movie" (2023).
While trying to find out who got Dee pregnant during this episode, outside of the TV show the actor who plays Mac (Rob McElhenney) actually got the actress who plays Dee (Kaitlin Olson) pregnant.