Bonanza S04 E31 Thunder Man

"America's Favorite TV Western"

Little Joe's 19-year old girlfriend is killed by a good samaritan, an explosives expert who had stopped to render aid to the woman's uncle after he suffers a stroke. Unable to talk, the only clue he can offer the investigating Cartwrights is a scrawled title of the song the assailant was whistling — ""New Orleans Woman.""