Series Overview
| Season | Episodes | Originally aired | DVD release date | |||
|---|---|---|---|---|---|---|
| Season premiere | Season finale | Region 1 | Region 2 | |||
| 1 | 13 | March 7, 2006 (2006-03-07) | May 16, 2006 (2006-05-16) | September 19, 2006 (2006-09-19) | April 30, 2007 (2007-04-30) | |
| 2 | 23 | September 19, 2006 (2006-09-19) | May 8, 2007 (2007-05-08) | September 25, 2007 (2007-09-25) | October 22, 2007 (2007-10-22) | |
| 3 | 11 | September 25, 2007 (2007-09-25) | December 18, 2007 (2007-12-18) | October 14, 2008 (2008-10-14) | October 20, 2008 (2008-10-20) | |
| 4 | 22 | September 28, 2008 (2008-09-28) | May 10, 2009 (2009-05-10) | September 29, 2009 (2009-09-29) | February 22, 2010 (2010-02-22) | |
Read more about this topic: List Of The Unit Episodes
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“As Cuvier could correctly describe a whole animal by the contemplation of a single bone, so the observer who has thoroughly understood one link in a series of incidents should be able to accurately state all the other ones, both before and after.”
—Sir Arthur Conan Doyle (1859–1930)