Deciding the Circle needs to have a little fun, Faye (Phoebe Tonkin) convinces Cassie (Britt Robertson) to throw a big Halloween party. Intent on wooing Jake (guest star Chris Zylka) back, Faye goes all out on her Halloween costume. After a fight with Diana (Shelley Hennig), Adam (Thomas Dekker) turns to Cassie for advice. Meanwhile, some dangerous, uninvited guests set their sights on the Circle.
