What makes is it so scary?
I grew up on this show and like so many was horrified by/simultaneously obsessed with it.
The Dennis Farina repackaging of the show has never had the same affect as the old Robert Stack episodes, yet they use the same footage—and yet I still am not entirely sure what it is that makes the show so damned scary. Sure, Stack's voice and cadence was creepy, and the theme song is also unbelievably—so is it just those two things, or all of it together? The footage which was recycled for the Farina episodes, while creepy, doesn't have the same punch as it does in the old episodes, so that tells me something I guess.
I have a bunch of the old broadcasts that were ripped from VHS and burned onto DVD-Rs for me as a gift, and I went through a period several months ago where I was bingewatching them at night in my apartment, but I would get so creeped out by some of the episodes that I'd have to turn it off—and I'm a 26 year old male.
I think that part of it has to do with the fact that many of the cases profiled on the show—horrific murders, bizarre disappearances, etc.—occurred so long ago, and will likely never be solved. It's almost like watching those old episodes is like looking into a void, or at snapshots of something horrific, inexplicable, or mysterious that happened in the past; things that still can't be answered, but have largely been forgotten in time.
That's just me though hypothesizing. It's very strange how this show managed to be so scary to so many people, and how the recycled Farina episodes were so much the opposite.