Dave announces that he may have parasites crawling around head, prompting Paul to call him a ""maggot brain""; Dave and Steph/Monty go over vacation pictures; Dave confirms that he has parasites by taking a sentence on a blue card too literally; a guy bouncing a giant tether ball to his head makes an appearance on ""Is This Anything?""
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Ready to Watch Late Show with David Letterman, Season 8, Episode 178?