This week on A Prairie Home Companion--a summertime rebroadcast featuring two shows we did with a great guitarist: Mark Knopfler. In 2004 he came solo and collaborated a bit with Geoff Muldaur. And this past year, he came with Emmylou Harris. Guy Noir dreams of Bogart, Ruth Harrison dreams of love, and in Lake Wobegon: Arlene Bunsen buried her leftover Easter ham in the backyard ... all coming up on this week's show.