Heavy on the horns and guitar, Jay Livingston and  Ray Evans' theme for 'Bonanza' evoked the fantastic sounds of the wild west, guaranteeing a thrilling adventure each week for viewers. Popular with your grandpas, 'Bonanza' aired from 1959 to 1973; with 430 episodes, it was the second longest-running western series after 'Gunsmoke.' But it totally had the better theme.