They are available. Search for 'University challenge series 50 Internet archive'. No problems with episode 07 there, and other episodes are listed. Though an issue with series 49 and 50, on both CosmicPumpkin and Internet archive, is the sound disappearing partway through an episode.
I thank you for making these episodes available to us, but what happened to E6 and 7? And 9/10/11?
They are available. Search for 'University challenge series 50 Internet archive'. No problems with episode 07 there, and other episodes are listed. Though an issue with series 49 and 50, on both CosmicPumpkin and Internet archive, is the sound disappearing partway through an episode.