American Horror Story

Connie Britton who played Vivien in 'Murder House', wanted to play a role in 'Coven', but had commitments to her show, 'Nashville' (2012).

Every scene involving Bette and Dot on season 4 required more than 10 hours to film, because it had to be repeated several times to film coverage and the interactions between Sarah Paulson, playing each time a different role, and the other actors.

In season 4 (Freak Show), characters sing songs that were released after 1952 (the time period in which Freak Show takes place). Many fans criticized and disliked this, but there is a deep and unique reason to this idea. Ryan Murphy has said in an interview that he picked songs that were made by artists who were known as or called themselves freaks. For example: David Bowie, Lana Del Rey, Nirvana, etc.