Pretty Little Liars Season 4

While they nervously await what new surprises "A" has in store for them, the girls try to extract information from Mona, who's also being targeted... Season 4 begins immediately where Season 3 left off. Pretty Little Liars was renewed by ABC Family on October 4, 2012. Production began in mid-March 2013 and ended in early November 2013. It consisted of 24 episodes, aired on/off between the summer 2013 and the spring 2014. It briefly returned for the annual Halloween PLL Special episode in October 2013, and resumed new episodes in January 2014.