Seasons one and two of "Third Watch" are available on DVD and video streaming services, such as Amazon Video and CraveTV, as of 2015. However, the third through sixth seasons are unavailable for purchase or viewing due to music licensing costs for the third season.
To view the first two seasons of "Third Watch" on Amazon Video, visit the Amazon.com home page and select Amazon Video from the drop-down menu next to the search box. Perform a search for "Third Watch," and click on a season. Although the site lists the third season, it doesn't have any of the episodes available. You can purchase individual episodes from either season or purchase a full season. Episodes from season one are also available for free streaming with advertisements.
Warner Home Video released the first season of "Third Watch" in 2006, although its region one release in the United States wasn't until 2008. It released season two in 2009. The company participated in a live online chat on TVShowsOnDVD.com in 2010, and when a member asked about subsequent DVD releases for "Third Watch," the response was that the third season of the show had "very high" music costs. TVShowsOnDVD.com followed up with Warner Archive Collection in December 2011, but the company stated that there was nothing to report.