Nigel and Woody team up to stop the murderous rampage of a serial killer named the Hangman, an Internet-savvy psycho who communicates with Nigel via taunting posts on Nigel's blog. Meanwhile, Jordan is assigned to audit past autopsy cases for anomalies and discovers Bug may have helped put an innocent man behind bars years earlier.

Deep secrets are exposed when Jordan, Macy and Det. Matt Seely team up to investigate the slaying of a teen girl. Meanwhile, Woody tries to unravel mysteries surrounding a mummy, only to make a startling discovery; and Macy corners Jordan about her declining health.