The Jenna Thing

With Jenna's return to Rosewood, the girls are forced to face 'the Jenna thing,' an unpleasant incident from their past that sealed their friendship forever, especially since "A" won't let them forget it.

Meanwhile, questions about the night of Alison's disappearance begin to arise, and the events of that fateful night continue to haunt Aria, Spencer, Emily and Hanna.