Host Luke Burbank and announcer Elena Passarello reminisce about their most memorable Halloween costumes; filmmakers Cristina Costantini & Kareem Tabsch reveal the man behind the cape in their Netflix documentary "Mucho Mucho Amor" about famed Puerto Rican astrologer Walter Mercado; and singer-songwriter Anaïs Mitchell takes us to the underworld of Greek mythology to discuss her Tony Award-winning folk opera "Hadestown," before performing one of its hit tracks "Wedding Song."