The 2001 PBS series Sagwa The Chinese Siamese Cat had only about a quarter of it's 40 episodes (79 segments) released onto DVD. The show was removed from most PBS stations by late 2008, by which time several more episodes had surfaced onto YouTube. It continued to air on TV Ontario in Canada for quite a few years, however.
In 2014, several more episodes were uploaded, some in somewhat poor quality. As of 2016, there are still nine episodes that remain at large.
|19b||Master Of Mistakes|
|22b||A New Cook In The Kitchen|
|26a||Luck Be a Bat|
|26b||Tea For Two|
|31a||The Jade Rabbit|
UPDATE 12/7/16: The episode Invention By Mistake was uploaded in low quality to youtube by Darris Jolly and it was recorded off of TVO KIDS.
UPDATE 11/4/17: A petition to get the complete series released on DVD has been started: https://www.change.org/p/discotek-media-release-sagwa-the-chinese-siamese-cat-on-dvd
UPDATE 6/25/18: TFO's MiniMation YouTube channel has been uploading episodes in French as of late, meaning the whole series might be closer to a complete DVD release.