The sixth season of the animated Star Wars: The Clone Wars television series, marketed as The Lost Missions, was originally intended to be a full 22-episode season, but just thirteen episodes were completed following the series' retraction from Cartoon Network in March 2013. The Lost Missions debuted on the German TV network Super RTL, airing between February 15 and March 8, 2014. Following the announcement of an exclusive licensing agreement with Disney and the ABC Television Group, Netflix released The Lost Missions on March 7, 2014, exclusively to audiences in the United States and Canada.
In September 2011, then–head writer Christian Taylor stated that they had already written through Season Six. The sixth season had begun production by October 2012, when Series Supervising Director Dave Filoni confirmed that his crew had begun working on scripts and designs for the season in Star Wars Insider 137.
Lucasfilm announced on March 11, 2013—following the series' fifth season finale—that active production on future episodes for Cartoon Network had ceased, but that the studio was continuing production on as yet unreleased story arcs. In the weeks following the announcement, clips were shown from episodes that would have been part of Season Six and will still be released, despite the series being pulled from Cartoon Network. During the "Secrets of Star Wars: The Clone Wars" panel at Celebration Europe II, Filoni implied the small possibility that Season Six might end up being shown on television in the future.
On October 11, 2013, Filoni announced that his crew had completed production on the remaining The Clone Wars episodes and that they would be released in early 2014.
On January 16, 2014, the German television network Super RTL announced that it would be airing episodes of the series' "sixth season" on Saturdays, beginning on February 15 with four new episodes and continuing into the coming weeks. On February 13, 2014, StarWars.com announced that the series' thirteen final episodes would be released as "The Lost Missions" on Netflix in the United States and Canada on March 7, as part of a deal that also included the series' feature film and first five seasons. The "Launch Pad" department in Star Wars Insider 148 revealed the English names for the episodes as well as plot summaries and credits.
The Lost Missions debuted on Netflix on March 7 at 12:01 am PT, effectively bringing Star Wars: The Clone Wars to its conclusion. Coinciding with the Netflix launch, StarWars.com released official episode guides to accompany each of the final season's thirteen episodes.
Beginning on June 9, 2014, The Lost Missions became available on seven additional online formats, including Apple iTunes in the US and Canada, Amazon, Google in the US and Canada, Microsoft in the US and Canada, Sony in the US and Canada, Verizon, and Vudu. The episodes were released on Blu-ray and DVD on November 11, 2014.