The Unit is an American action-drama television series that focuses on a top-secret military unit modeled after the real life Delta Force. The program features both the domestic lives of the team members and their missions abroad, in addition to the effect 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, and the third season premiered on September 25, 2007.

Based on show producer Eric Haney's book, Inside Delta Force: The Story of America's Elite Counterterrorist Unit (ISBN 0-440-23733-5), The Unit was created for television by David Mamet and is executive produced by Mamet and Shawn Ryan. The show is produced by The Barn Productions Inc., David Mamet Entertainment, and Fire Ants Films in association with 20th Century Fox Television and CBS Paramount Television.

Internationally, The Unit premiered on 3 October 2006 in the United Kingdom on Bravo, on 11 October 2006 in Australia on the Seven Network, on 11 January in Spain on La Sexta, on 25 January in The Netherlands on RTL 5, on 7 March in Germany on Sat. 1 and on September 23 in Bulgaria on bTV

The show's theme song for the first two seasons is an adaptation of the United States Marine Corps running cadence song "Fired Up... Feels Good" and created by the Los Angeles based composer Robert Duncan. The new theme song for the third season, also by Duncan, is called "Walk the Fire".

Production of the show was halted during the WGA Writers strike of 2007-2008. Only 11 episodes were filmed and broadcast, it is unknown if any more are to be produced. As yet no official confirmation regarding a 4th season has been announced.

The sign at the entrance of the 303rd Logistics building lists CSM E.L Haney at the unit's First Sergeant. Eric L. Haney is the author of Inside Delta Force, the books upon which the show is based.