Lynne Rossetto Kasper shares her retirement announcement with The Splendid Table listeners and welcomes new show host Francis Lam. Writer Lisa Napoli investigates Ray and Joan Kroc, the power couple behind the beginning of the McDonald's empire. Daniel Klein and Mirra Fine take their wonderful online food show The Perennial Plate to Ireland, where they learn about turf-smoked salmon and find themselves in unique situations with chef Katie Sanderson. Tucker Shaw from America's Test Kitchen shares his team's tips for keeping your sink, sponges and refrigerator safe and sanitary. Plus, YouTube sensation Hannah Hart on how she unexpectedly created a online community with My Drunk Kitchen.