Question: what happened to the pretty little liars in the dollhouse?
Answer: They all woke up without clothes and white blankets over them. According to Mona, they slept about 3-4 hours inside the morgue. Later on, it's revealed A knocked the Liars out in order to place GPS microchips inside the back of their necks, allowing the Liars' every move to be tracked outside the Dollhouse.