Episode titles during the first season were taken from song titles from the 1960s. Episode titles in the second season were taken from the Beatles' "White Album".
"Sadie" is one of Manson's most loyal followers in the show. In real life, Sadie was Susan Atkins' nickname given to her by Manson. She became a born-again Christian in the mid-70's, renounced Manson, and died of a brain tumor while still incarcerated in 2009.
"Healter Skelter" is written on the fridge at the LaBianca murder house. Helter Skelter was a song on the Beatles 'White Album'.
Debra Tate, sister of Sharon Tate, urged a boycott of this show. She said the graphic depictions of the murders were "extremely insensitive," and that movies and television need to change the way they portray real-life murders. She attempted to schedule a meeting with NBC to discuss the matter, but was "completely ignored."
Vincent Bugliosi, who worked extensively on the Manson case, wrote a book about Manson and the family called Helter Skelter.