 The Cat returns to the safety of his house, but the Grinch follows him there to demonstrate a device he has invented, a "Vacusound Sweeper" that scrambles all sounds within a 50-mile radius, including the Cat's voice.Back home, the Grinch decides to upgrade the sweeper into a "darkhouse", an anti-lighthouse that spreads beams of darkness.The Cat becomes upset with the Grinch's hijinks and has a psychiatric session with him in a thought bubble to find out what makes him so mean-spirited.