An outstanding music-performance series featuring in-studio concerts. It's in its second go-round on PBS. The first ran from 1974 to 1985 and included sets from Bob Dylan, Al Green, Aretha Franklin, the Temptations and Bonnie Raitt. The new show has spotlighted the likes of Alison Krauss and Union Station, Tom Petty, Lyle Lovett and Chris Isaak.