This week on A Prairie Home Companion, a look back with a slurry of memorable clips from 2011. Young and inspiring harpist Charles Overton plays Debussy, former New York City Mayor Ed Koch reads Shakespeare, and Gillian Welch sings Jefferson Airplane. Emmylou Harris joins The Royal Academy of Radio Actors as a waitress in The Lives of the Cowboys, singer-songwriter Tom Rush plays his only children's song, and Guy Noir is on bed bug detail. Plus, Rich Dworsky's "Other Carnival of the Animals," Nick Lowe's "Stoplight Roses" and the springtime return of the tundra swans to Lake Wobegon.