subject: Who is ‘A' in Pretty Little Liars Episodes? [print this page] Later, Alison flees from the centre and kidnaps her sister and buries her alive. Somehow, Mona reads the diary. Spencer discovers that Mona is A'. Therefore, Mona attempts to push Spencer off the cliff. However, she falls off the cliff accidentally instead of Mona. After that, Alison is revealed to be A'. Knowing all these facts, one can measure the level of excitement that is about to come on Pretty Little Liars episodes.
