A few years ago, Stephen La Riviere wrote an excellent book detailing the making of the Supermarionation-era TV shows. The level of detail as well as the newly discovered photos made it a must read for any Anderson fan. It has now been announced that Network Distributing will be releasing a documentary based on the contents of this book.
It will be released August-September of 2014 and promises to include a great many newly discovered gems. In addition, a lot of new material has been filmed which shows how the special effects and puppets were filmed. There are several teaser videos available, and personally, I can't wait to see this.