Chelsea O'Toole

In this special Halloween episode, Aria, Emily, Hanna and Spencer are looking forward to some good Halloween fun now that the traumatic events with Nate are behind them. With "A" running amuck and unexpected party-goers popping up at every turn, this Halloween event becomes one killer party.

Spencer and Emily make plans to visit a nearby college, but they have very different agendas for their time spent on campus. Spencer's singular focus to figure out Ali's apparent connection to the school contradicts Emily's real fears about her plans for after graduation.

Hank treats a chatty socialite who disappears before he can diagnose her. Meanwhile, Divya is called to Adam's estate and finds herself surprised at how scared she becomes when his health begins to fail.