Happy Days: Welcome to My Nightmare (1981)

This Season 8 episode originally aired February 3, 1981.  After a day of everyone asking favors of him, Fonzie has a nightmare about a mad scientist draining his cool. (Synopsis from TV.com)

The Worst Witch (1986)

Originally released November 1, 1986. Mildred Hubble is the flunk-out of the Witch's Academy...that is, until she gets her big chance to show everyone just how much magic she can make! The school's headmistress Agatha has an evil twin, who is plotting to cause havoc just before the big Halloween celebration and visit by the Grand Wizard. Can Mildred find a way to stop this plot before it ruins the party? This family fantasy features a stellar cast, including Diana Rigg and Tim Curry, as well as plenty of enchanting action.

Mickey Mouse: The Mad Doctor (1933)

Mickey tries to rescue Pluto before he becomes part of the Mad Doctor's grotesque experiment.

Star Trek: Catspaw (1967)

Originally aired October 27, 1967. When Kirk and his landing party arrive on the planet below, they are met by eerie mists, a dark castle, witches, goblins and a black cat. They soon learn that they are under the influence of a wizard, Korob, who tries to bend them to his will. They also soon learn that the black cat they saw is more than she appears and is in fact a powerful witch in her right. It is left to Kirk and Spock to find a means to escape their grasp. (Synopsis from IMDB)

Family Matters: Dark and Stormy Night (1994)

Originally aired October 28, 1994. On a dark and stormy Halloween night, the Winslows play Pass the Ghost Story, in which Carl and Harriette are 19th century vampires licking their chops over the wayfaring Sir Steven. (Synopsis from TVmaze.com)

The Flintstones Meet Rockula and Frankenstone (1980)

Originally aired October 30, 1980. The Flintstones and Rubbles win a trip on "Make a Deal or Don't" to Count Rockula's castle in Rocksylvania where they have an unpleasant meeting with the Count and his servant Frankenstone.

The Three Stooges: The Ghost Talks (1949)

Originally released February 3, 1949.

That's Incredible: Ghost Castle (1981)

That's Incredible! was one of my favorite shows in the 80s because I could always depend on it for tales of strange phenomena. I only remember a handful of segments that could be classified as Halloween-oriented. This particular segment about a haunted castle in New Jersey features testimony about objects being moved around the room and other occurrences. The residents believe the ghost to be William Beatty, the man who built "Castle Utopia" in the 1920s and died in one of the rooms. The current owners of the property have renamed the home Phareloch Castle and are in the process of renovating the structure.