James and Martin hit Chicago, Illinois, to make the greenest beer ever for St. Patrick's Day. But how will they make a draft that looks, tastes, and is made as green as possible? The boys get in the spirit by joining a traditional Irish hooley and taking in some local color, including a beer and bacon tasting. But the duo wants a truly Chicago beer--and it wouldn't be a Windy City draft without a wind-powered brewery! See whether their experiment can be a St. Paddy's hit, or a green disaster!