"In Search Of" is a series that began its initial run in the late 70s and early 80s. It lived on in syndication pretty regularly through the 90s. It was a show that focused on paranormal issues of all types and the thing that held it together was that it was hosted by Leonard Nemoy. It was shot on old, cheap film so if you combine its gritty look with his haunting voice then you're in for a treat.
This episode is one that focuses on Bigfoot. The people who own the rights to this show must not be that protective over it as I think the whole series is on YouTube. It's pretty great, check it out!