"Pretty Little Liars" wrapped up the first half of season 1 without really unveiling the identity of 'A'. The big question's answer was only known to one of the four best friends, Hanna. But just when something good is about to happen, something bad gets in the way. Hanna was hit with a car before she told the other girls, and viewers.

The culmination of the mystery all happened during Mona's glamping (glam camping) party which includes a scavenger hunt. 'A' has challenged the girls to find out about him/her during the game and Hanna wanted to make the most of it. Together they found out that their missing friend Alison was involved with Spencer's boyfriend Ian when they saw their names craved on tree bark.