Queen Charlotte was never mentioned in the book series at all, much less did she take note of Daphne's love life. Her son and reigning monarch, the Prince Regent was occasionally mentioned, although the Bridgertons - while being the most popular family in town - never socialized with royalty.
During the scene of the ball that Daphne attends with the Duke, the song that the band is playing is an arrangement of the pop hit "Bad Guy" by Billie Eilish.
Prince Friederich did not appear in the book series.
The episode won an Emmy Award for Outstanding Period and/or Character Hairstyling.
In keeping with Bridgerton (2020)'s aim to bring more modern sensibilities to period drama, this episode features a scene of female masturbation.