Zingalong (Partially Found 2003 Children's Series)
Zingalong was a little known programme that aired on the BBC's CBeebies from 2003 to 2005. The show revolves Zing, a machine from outer space, visiting a nursery to collect new sounds and explore noise with the help of Zoe, played by Marie-Claire McManus.
It is unknown how this series went missing, as since the wiping phase the BBC has worked hard to keep every part of their archive intact. It would've most likely simply fell into obscurity and went missing from there.
July 15, 2015 UPDATE: Jaden Cargill has uploaded a full episode of Zingalong to YouTube! It is likely the second episode based on its title. Big thanks to Jaden Cargill for uploading an episode of the previously lost series! The full episode can be viewed below.
January 28, 2016 UPDATE: YouTube user CBeebies2002to2010 has uploaded an incomplete episode.