Once Upon A Midnight Scary was a children's horror anthology Halloween special that aired on CBS in 1979. Similar to such horror anthologies as Creepshow, Tales from the Crypt and V.H.S. (as of recent), Once Upon A Midnight Scary depicted three different literary horror stories during its hour-long run.
However, unlike its adult counterpart, this CBS special was meant to encourage children to read the original books - so only an excerpt of each story was shown. Still, each story was introduced by Vincent Price as a vampire. Can't beat that.
Where to watch it now: YouTube