At the 1965 Newport Folk Festival, Bob Dylan famously plugged in and used electric instruments to give a rock-'n'-roll charge to folk music. Less famously, in a '94 concert on MTV, Dylan plugged out, giving the alt-rock generation an intimate acoustic look at his musical mastery. That concert, MTV Unplugged, will be released this week on DVD for the first time, along with four extra songs including his classic Desolation Row that weren't in the original TV broadcast.