Sagwa, The Chinese Siamese Cat (partially lost original English audio of animated series; 2001-2004)
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 2015, the episodes that remain at large are "Master of Mistakes" (episode 19b), "Invention By Mistake" (episode 21b), "A New Cook In The Kitchen" (episode 22b), "The Competition" (episode 23b), "Luck Be a Bat" (episode 26a), "Tea For Two" (episode 26b), "...And Action" (episode 27b), "The Jade Rabbit" (episode 31a), "Three Graces" (episode 33b), and "Homesick Jun" (episode 37b).