A 1959 promo shoot in a rock quarry put Ira and Charlie Louvin in crisp white suits in front of a 12-foot plywood devil that Ira built himself, with kerosene-soaked tires burning just out of frame. That image, the cover of Satan Is Real, captures the contradiction at the center of this episode: a duo with some of the most devout, precise close harmonies in country music, sustained by a partnership in chaos. Raised in Henagar, Alabama on Baptist shape-note singing, the brothers born Loudermilk moved from gospel to secular country, recorded "The Get Acquainted Waltz" with Chet Atkins, and reached the Opry in 1955.

The hosts break down the voice-exchange technique in which Ira's high tenor and Charlie's lower part crossed mid-phrase, and set it against Ira's drinking, temper, four marriages, the mandolins he smashed on stage and glued back tog ...