- Previous episode S05E03 - In the Valley of the Shadows
- Number S05E04
- Director Michael Pressman
- Writers Andrew Schneider, Derek Haas, Diane Frolov, Dick Wolf
An entire apartment complex is forced into quarantine when cases of a deadly virus turn into an epidemic. P.D. chases a lead that could point to a case of bioterrorism, and Will gets dangerously close to the suspect.