The theme song of the show was "Long, Lonesome Highway," and Michael Parks sang it himself. It's one of those freedom songs that sticks in your head, and I remember the words four decades later. I always wondered what happend to Michael Parks, but I saw him recently in Chill Bill #2. You probably did too, without knowing who he was. He played Esteban Vihaio, the Mexican pimp with the genteel manners and fine clothes who tells the protagonist where she can find Bill, played by the late David Carradine.
Son, this one's for you.
Here's Michael Parks in "Kill Bill No. 2".