Seth meets three chefs who are masters of using hot peppers and balancing the intense heat with incredible flavors. Along the way, he samples muu som, a stir-fried rice-fermented sour pork dish at Thip Khao in Columbia Heights; junglee laal maas, a spicy goat curry at Pappe in Logan Circle; and a whole steamed fish with fermented peppers and scallions at Q by Peter Chang in Bethesda, MD.