The show's producers know that it's not the first to introduce the horror-thriller genre. Thus, rather than pretentiously attempting to distinguish itself as a groundbreaking thriller, Pretty Little Liars recalls all of the conventions that get genre fans giddy and throws them refreshing and familiar tidbits from the spooky films they love. In the past two seasons, the show has aired scenes inspired by The Shining, Psycho, and Black Swan.