Twin Peaks

Freddy's Nightmares [3 seasons]
Tales From The Crypt
Night Gallery
V aka Visitors [mini series original]
Monsters
Alien Nation
Amazing Stories
Friday The 13th The Series
Unsolved Mysteries < Documentary based but some were supernatural based
War Of The Worlds
Werewolf < more action based
Some of these are more sci-fi but still good

There were none,

I just saw Horrorhound said this one but I had to post the link.

Awesome show. :)

Yeah, well that way you would certainly have a lot more.

With the 70s, there was Doomwatch, Fantastic Journey (about a group of people having strange adventures, whilst stuck in The Bermuda Triangle), The Night Stalker and ITV's Tales of the Unexpected and Armchair Thrillers.

The 80s were not a great decade for these kinds of shows, but with the 90s came X Files, Dark Skies, perhaps even Buffy and Angel?

Some people may consider the likes of Gerry Anderson's Sci-Fi shows of Captain Scarlet and The Mysterons, UFO and even Space 1999 as "spooky", at least some of the time, depending largely on your definition of the word.

Then perhaps you can go into other Sci-Fi shows, such as Land of the Giants, Time Tunnel, Logan's Run and the earlier Dr Who series, although the recently revived Doctor Who also goes "spooky" occasionally.

Oh, nearly forgot the 70s show The Tomorrow People.