Lowest rated episode of the fourth season as of November, 2017.
The Brodie twins were very real. Rodney and Roger Brodie were born in Rock Island, Illinois in 1951 were the first craniopagus twins separated by surgery with a survivor. Months of tests performed at the University of Illinois determined that the twins had individual nervous systems and could be separated. In December 1952 a medical team led by neurosurgeon Dr Oscar Sugar attempted to separate the 15-month-old twins in a surgery that lasted 12 hours. During the operation, the doctors discovered that the twins shared the sagittal sinus, the canal that drains blood from the brain to the heart. Both twins initially survived the surgery, but Roger Brodie did not regain consciousness and died 34 days later. Rodney Brodie recovered from the surgery but suffered from neurological damage. Because his skull was never closed, he wore a helmet until his death at age 11.
Evan Peters plays Jimmy Darling in AHS: Freakshow. His character is based on the real life "Lobster Boy," Grady Stiles Jr..
The musical theme played throughout Season 4 (Freak Show) is taken from the opening notes of the song "Black Sabbath" by Black Sabbath. It is played an octave or two higher and on violins, however. It is also played during the ending credit sequence of each episode.