The Paul Lynde Halloween Special (1976)
Found this rare gem a little while ago and thought it should be shared!

The Paul Lynde Halloween Special is a Halloween-themed television special starring Paul Lynde broadcast October 29, 1976 on ABC. It featured guest stars Margaret Hamilton in her first reprisal of her role as The Wicked Witch of the West from The Wizard of Oz. Also guest starring are Billie Hayes as Witchiepoo from H.R. Pufnstuf, Tim Conway, Roz Kelly, Florence Henderson, rock band KISS, Billy Barty, Betty White and, in an unbilled surprise appearance, Donny and Marie Osmond.
via YouTube https://youtu.be/4psTeRpQ-1o