Test cook Bridget Lancaster shows host Christopher Kimball how to make skillet roast chicken and potatoes at home. Then, tasting expert Jack Bishop challenges host Christopher Kimball to a tasting of brown mustard. Then, Chris shares a test kitchen tip for aerating wine. Next, test cook Julia Collin Davison uncovers the secrets to perfect Brussels sprout salad. And finally, Chris teaches a cooking class all about secret ingredient biscuits.