This week on A Prairie Home Companion, it's a garden fresh hot dish of shows from the Greek Theater, in Los Angeles. Featuring Bonnie Raitt singing duets with Keb' Mo', Randy Newman singing a song for his beloved New Orleans, and Martin Sheen taking on multiple dramatic roles: a crotchety Irishman, a slippery movie producer, and a difficult tour bus operator. Paula Poundstone and Erica Rhodes also sit in with the Royal Academy of Radio Actors, and in Lake Wobegon -- the story of Herman the Human Lightning Rod, survivor of seven atmospheric discharges.