From stage to street, Spark goes behind the scenes with artists who aren't afraid to talk politics. Activist Michael Franti takes on corporate America, the criminal justice system and the cause of disadvantaged people everywhere to the tune of a funky, soul-driven hip-hop beat. With his two-play cycle, Continental Divide, acclaimed British playwright David Edgar along with the Berkeley Repertory Theatre take aim at American politics. Then go undercover with the renegade artists and copywriters of the Billboard Liberation Front (billboardliberation.com) as they use wit to conduct guerrilla attacks on corporate signage.