In Episode 2 of Whiskey High IQ, the host explains what defines a bourbon, covering key requirements like being made in the U.S., using at least 51% corn in the mash, and aging in new charred oak barrels for at least two years. The episode also introduces three bourbons for the next week's tasting: Evan Williams Black Label, Maker's Mark (a wheated bourbon), and Wild Turkey 101 (a high-rye bourbon), each offering distinct flavors and proof levels. The host guides viewers on how to properly taste whiskey, including using the right glass, swirling to release aromas, assessing the legs, nosing, and tasting with a primer and second sip. They highlight the importance of smell in taste and emphasize personal preference in tasting whiskey, encouraging viewers to follow along in future tastings. The episode concludes with a preview of the upcoming tasting session.