What is the name of Scooby Doo episode with three presidents?

The Scooby-Doo episode featuring three presidents is called "A Night of Fright is No Delight".

It's a classic Scooby-Doo episode from the original series, airing in 1970. The episode features the gang investigating a haunted amusement park where the ghosts of three former presidents are said to roam.