Talk:Songs of Experience/@comment-6957723-20150611205437/@comment-4393153-20150612154447

I read in an interview that Marlene King said they came up with the idea of Charles after Mona was outed, so presumably they knew in season 3

Spencer was never supposed to be the A, she was supposed to be like Toby, a subordinate. It was basically her arc that was already there, just not as compacted as it was.