4x05 Conversations and Confrontations

In the season finale, as Sam and Geoff arrived in Sulphur to interview Tanya McCoy, they receive a FaceTime call from Detective Valerie James about a fifth murder. The two talk with Tanya about ghost stories in Sulphur, Ada, Blackwell, and other small towns, as well as the Skirvin Hilton Hotel in Oklahoma City. A few days after the interview, Geoff requests Sam to join him outside the Norman Public Library, where Geoff plans to confront George Grayson.