Oz Complete Re-watch. Season 6, Episode 2. "See No Evil, Hear No Evil, Smell No Evil." Wed March 8th, 2017.

From IMDB: "The unexpected arrival of Mayor Loewen at Oz spurs an ironic turn involving Schillinger and Beecher. Meanwhile, Dr. Nathan discovers why solitary inmates are getting sick. A new business plan within Oz inspires Redding."