Posh people having extremely polite arguments over dinner while the staff do all the actual work downstairs.
Fun fact: Highclere Castle, the real filming location, was once home to the discoverer of Tutankhamun's tomb.
Four hundred people in debt playing red light green light for their lives, and we all just watched it.
Fun fact: Hwang Dong-hyuk wrote the script in 2008 and spent ten years being rejected by every studio.