The comments section at AV Club is usually worth reading and there's a good conversation there, where some folks are pimping "Hush" from BtVS and "Blink" from Dr. Who.
Also naming specific episodes of New Twilight Zone, Night Gallery, TV movies and Tales From the Crypt. See now, that's an online conversation becomes a useful resources.
A marathon of TV horror could be pretty cool.
Definitely need some Twin Peaks in there...
Some of the TV recs I've ganked from the conversation:
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Other TV episodes/shorts I'd add if the marathon was longer:
The Simpsons Treehouse of Horror episode with The Shinning segment
Tales From the Darkside episodes: Inside the Closet, The Last Car
The Twilight Zone episodes: Nightmare at 20,000 ft., Twenty-Two, The Hitch-Hiker
Alfred Hitchcock Presents episodes: One More Mile to Go, Breakdown
Fear Itself episodes: The Eater, Skin and Bones
The 1953 James Mason-narrated Tell-Tale Heart animated short
Tim Burton's Vincent
A Bit of Fry and Laurie Gellian Gutfright skits
X-Files, maybe "Home"? And the pilot of "The Walking Dead" was a pretty darn solid zombie movie, really.
The Tales From The Crypt episode about the lunatic who escapes from the mental asylum and dresses like Santa Claus.
That's And All Through the House, and it is the best episode of the show as far as I'm concerned.
Anyone remember the (Monsters? Darkside? Tales from the Crypt?) episode about the underground tunnels/Vietnam war?
Nightcrawlers from The New Twilight Zone!
New Twilight Zone, "Gramma"
Night Gallery, "The Doll"
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I'd add the original Alfred Hitchcock adaptation of Roald Dahl's "The Man From the South" - super creepy.
I'm pretty sure that Karen Black horror movie with the African Fetish doll was on TV originally.
I know Dana would have a good succinct list of creepiest X-Files. Flukeman?
And the Twin Peaks episode where Bob comes over the couch....
They just talked about "Home" on this week's Extra Hot Great podcast, and then they did a thing with all horror movie music, and I was fully creeped out.... by the time I got to work at 9 this morning!
What are the scariest episodes of Supernatural, or Angel?
For Angel I'd plump for "Are You Now or Have You Ever Been." It's dark and lingers in that horrible way.
Dollhouse had some super creepy episodes in the backstretch of its last season.
Hec, of those horror movies, is Asylum one that you've watched? I'm now curious as to how it ends, and can't find
the identity of the former asylum chief and what happens to the new candidate.
I haven't seen Asylum, billytea. But I bet they have it at my ultra-well-stocked vid store, and now I'm intrigued.
Seriously, you can't get a spoiler for it on Wikipedia? Lame, Wikipedia!
I've got a long fascination with horror anthology movies.
Dead of Night - Michael Redgraves and the world's scariest ventriloquist dummy.
Black Sabbath - Boris Karloff's sole portrayal of a vampire is one of the best ever.
Spirits of the Dead - Fellini's "Toby Dammit" is uber-cool.
Trilogy of Terror - Karen Black vs. the Zuni doll.
And the Twin Peaks episode where Bob comes over the couch....
Man, I was babysitting by myself watching that episode, and there was this thumping noise I couldn't identify, and I tried to get my mom to come across the street and watch it with me but she wouldn't b/c she was watching it at home and was too scared. (The thumping was bass from a party down the street).
From early SPN, I would say the one with the shadow beasts where Daddy Winchester finally shows up. And maybe the hellhounds, and I should just stop because I can't remember any episode names. "Hookman" scared the crap out of me, but I'm susceptible to that kind of stuff.
Scary Angel episodes... "Habeas Corpses?" Or was it "Corpus?" You know, the zombie lawyer one.
On a semi-related note, I sold my Buffy s2 and s4 DVDs and now can't do my annual rewatch of "Halloween," "Fear Itself," and "Hush." Hrmph.
For horror TV, the original Lars Von Trier Kingdom would be my top pick.