I watched the season 26 limited blu-ray version of
Ghost Light last night.
The dvd was quite poor in it's picture quality. I don't think it was film grain as such more like a hazy image full stop. Hopefully you can see what i mean from this still.
The restored blu-ray version is so much cleaner and sharper and the haze is gone.. It now looks like this.
I was amazed at the difference and always wondered why
Ghost Light looked so poor, especially as the rest of the season looked fine and it's one of my favourite stories, so i'm delighted to have bought this when it came out in Jan 2020.