Peter, Paul & Mary celebrate folk music's past, present and future in this companion to the special produced and aired as part of PBS's Great Performances. It's a star-studded event that finds the trio collaborating with an assortment of talented friends including ex-Weavers Ronnie Gilbert and Fred Hellerman, as well as Buddy Mondlock, Odetta, Tom Paxton, John Sebastian and others. Featured tracks: "The Times They Are a 'Changin''," "The Great Mandala (The Wheel of Life)" and "Virtual Party . "