On this episode of What's On Tap, Milwaukee PBS Producer Brian Ewig and UW-Milwaukee Director of Undergraduate Studies, African and African Diaspora Studies Rob 'Biko' Baker, Ph.D. join the show to talk about the new Milwaukee PBS documentary, "Wisconsin's Underground Railroad". Then, Skylight Music Theatre Executive Director Susan Varela and Artistic Director Michael Unger present the Song You Need to Hear, THe Colors of Paradise, from The Spitfire Grill.