Pretty Little Liars S02e12 Hun-mgm44:14 - Min

She is lured to a barn and nearly dies from carbon monoxide poisoning before being "saved" by a vision of Alison.

'Pretty Little Liars,' Season 2, Episode 12, 'Over My Dead Body'

At around the , the episode concludes with several major revelations:

The final scene shows Dr. Sullivan sitting in a diner with "A." She is clearly distressed and accepts an envelope from them, implying she was forced to help set up the girls.