Tina Fey, who was fearful the show would be canceled throughout the first season, called this episode "Goodbye America" during production, as she thought the plotline of a severely inbred Hapsburg prince having a birthday party would be so over the top that it would finally do the show in.
When Liz answers "Yeah" in German, she actually says some random German words.
Jack informs Liz that he has dated pilates instructors and acrobats. Actor Alec Baldwin later married yoga instructor Hilaria Baldwin, whom in met in 2011. She got him to try an "acro yoga" class.
The House of Habsburg, also known as the House of Austria, is one of the most prominent and important dynasties in European history. In a bid to keep their power, the Habsburgs kept everything within the family. They relied on 'consanguine' marriages that partnered close relatives, such as first cousins, or uncles with their nieces. As a result, the "Habsburg jaw" has long been associated with inbreeding due to the high prevalence of consanguineous marriages in the Habsburg dynasty.