We feast on Philly's most iconic foods, then bring samples to a scientist to find out what makes greasy treats like cheesesteak and scrapple so irresistible.
Her journey back to the food she grew up with includes false starts, U-turns, and a mail truck full of sandwiches.
We follow one woman through the most important election of all. Plus we ask researchers if free coffee makes us happier, or more productive, employees.