Just after shooting for season three of Treme began this week, Variety reports that the fourth season will be the show’s last. Chronicling the hardships of the citizens of post-Katrina New Orleans, Treme has been a passion project for executive producer David Simon. The series has topped out at 2.2 million viewers last season, as compared to the 10.2 million for the premiere of Boardwalk Empire. HBO’s Michael Lombardo and Richard Plepler had continued to support the show despite the sluggish ratings. Treme stars Wendell Pierce, Khandi Alexander, Kim Dickens and Melissa Leo. The third season should air in the spring of 2012 with the final season filming around this time next year.