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Homer Simpson (voice of Dan Castellaneta) and his alcoholic friend Barney Gumble (also voiced by Castellaneta) sneak out of work and take a tour of the Duff Brewery, where they help themselves to the copious free samples of Duff Beer, Duff Lite, Duff Dry, Duff Dark, and Raspberry Duff. On his way home, Homer gets picked up for drunk driving, causing him to lose his license and to attend Alc-Anon meetings under a court order. He pledges to give up drinking for thirty days, in part to get his license back and in part to please Marge (voice of Julie Kavner), who is worried about Homer's fondness for alcohol. But Homer finds that going a month without beer is harder than he expected. Meanwhile, after Bart (voice of Nancy Cartwright) destroys a giant tomato that Lisa (voice of Yeardley Smith) was growing for a science fair project, she gets an idea for a new project -- an experiment in which she'll prove an ordinary hamster is smarter than her brother. Duffless was first aired on February 18, 1993.