The Scooby Gang go to the grand reopening of Grimsly Mansion and find themselves in a mystery to find a lost treasure.

"What a Night for a Knight" is the first episode of Scooby-Doo, Where Are You ... some mischievous magic seems to bring a suit of armor to life, under the light of the full moon.

See how your favorite snack-munching canine super-sleuth got his start as the first five Scooby-Doo episodes ever unleashed - the series pilot What a Night for a Knight, plus Hassle in the Castle ...