When does The Unit return?

The Unit is a top-secret military unit modeled after the real-life U.S. Army special operations unit commonly known as Delta Force. The show purports to describe the daily lives of Delta Force (called "The Unit" in the show) operators during training and operational missions, as well as their families back home. On May 19, 2009, CBS cancelled the series after four seasons.
The Unit was created for television and executive produced by David Mamet and Shawn Ryan. The show purports to describe the daily lives of Delta Force (called "The Unit" in the show) operators during training and operational missions. The Unit premiered on October 3, 2006, in the United Kingdom on Bravo.