Apparently, the BBC is in the process of restoring some of the 90+ lost episodes of Doctor Who in animated form:
https://www.bbc.com/news/video_and_audio/must_see/47784358/lost-doctor-who-episode-brought-to-life
https://www.bbc.com/news/video_and_audio/must_see/47784358/lost-doctor-who-episode-brought-to-life