An all-star cast will honor 55 remarkable years of public television, including Music Director Rickey Minor, Josh Groban, Jamie Lee Curtis, Ken Burns, Ziggy Marley, Lily Tomlin, Henry Louis Gates, Jr., Marlee Matlin, Nicholas Ralph, Noel Paul Stookey, Rick Steves, David Foster and Katharine McPhee, Adam Arkin, Courtney B. Vance, Martha Plimpton, Bill Nye, Joe Bonamassa, Sheléa, and many more.