Top 10 'Pretty Little Liars' unanswered questions

10. Who pushed Ian off the bell tower?

Do you remember Ian? He was engaged to Melissa and then chased Spencer through the church where he was going to push her off of the bell tower. He admitted that he killed Alison (or did he?) and then instead of him killing Spencer, a mysterious person came and pushed him.

This was the end of part A season one. That question needs to be answered soon.

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