"...The series was thought to have been lost forever but a cine camera-owning fan had captured them when they were first aired in the 60s and they were restored by BBC Worldwide.
Although the camera didn't record the sound, staff at the BBC have been painstakingly adding the audio to the fan's films so they can be shown next month."
http://www.dailymail.co.uk/news/art...or-Who-episodes-restored-fan-recorded-TV.html