It was 1985, and Chris Perry wanted to see something scary. But not just anything scary, he wanted something very specific. Perry and his friend and fellow vintage TV collector, Richard Down, had spotted an ad in the pages of one of England’s hefty 1980s media catalogs. It offered a single episode of an old BBC2 show, on a 16 mm reel, recorded way back in the 1960s. They ran to the nearest phone. The collectors just had to have it. The person who placed the ad claimed to possess…