Lonelyville (S07E04)

Writer Noah Brezner has awakened after a three-way with a blonde and a brunette, only to find the blonde dead, the brunette gone, and Noah with no idea what happened. Major Case is called in to investigate the death of a Jane Doe tied in Japanese bondage ropes, then strangled. Logan and Falacci are initially stumped by this lurid puzzle - their only clue to the girl's identity and demise is the pair of emeralds hanging from her ears. (iTunes)