S3, E6: Halloween festivities are put on hold after Audrey and her friends find themselves trapped inside an infamous abandoned house. Audrey searches for a way out, but only finds a way back…in time, to twenty-seven years ago, when she discovers that her past-self Lucy was once trapped within the same house. Meanwhile whatever trapped them in the house begins to put up walls (both literal and figurative) between Nathan and Duke, hoping to drive their tension to the breaking point.