Courage the Cowardly Dog: Season 1, Episode 4
The Demon in the Mattress/Freaky Fred (3 Dec. 1999)
"The Demon in the Mattress" Muriel needs a new mattress. The one she orders comes with a bonus: a demon, which takes over her body. Courage must find a way to get rid of the demon and the new mattress.
Director:John Dilworth (as John R. Dilworth)