The Unit is an American action-drama television series that focused on a top-secret military unit modeled after the real-life U.S. Army special operations unit commonly known as Delta Force. The series originally aired on CBS from March 7, 2006 to May 10, 2009. The program features both the domestic lives of the team members and their missions abroad, in addition to the effects their careers have on their home lives, wives and girlfriends. It premiered in the United States on March 7, 2006, on CBS as a mid-season replacement. The second season debuted on September 19, 2006.