Tales from the Darkside (1984)

S1E17 Madness Room

Cathy Osborne introduces her husband to a hidden room in their home, accompanied by her friend Michael. She shares a chilling story about the "madness room," claiming that no one has ever managed to spend the night without meeting a grim fate. However, it's all a ruse; Cathy and Michael have devised a scheme to frighten Cathy's husband to death. They orchestrate some eerie occurrences, but as events unfold, they discover that the room's haunting reputation may not be entirely fabricated.