• The Mighty Heroes: The Scarecrow (Ralph Bakshi, 1966, 8 min)
Ralph Bakshi created this series for TV prior to directing movies. I remember watching it as a kid in the 70's. This episode features some neat straw monsters.
• Serial Experiments Lain [opening credits] (Ryūtarō Nakamura, 1998, 2 min)
This haunting opening credits sequence with it's catchy theme song is one of the highlights of Lain, a deep thinking anime series that questions the nature of the Internet.
• Also, I've been re-reading The League of Extraordinary Gentlemen books. In this interview, writer Allan Moore talks about the creation of the series and it's illustrator, Kevin O'Neill.