Courtesy of Michael Gaffney Muhammad Ali talks with the press after winning back the Heavyweight Championship for an unprecedented third time by beating Leon Spinks at the Super Dome in New Orleans, La. Sept. 15, 1978. Encore Thursdays, Feb. 10 - March 3, 2022 at 8 p.m. on KPBS 2 / On Demand —ESPN’s The Undefeated joins PBS for conversation on sports, race and culture— MUHAMMAD ALI, a new four-part documentary directed by acclaimed filmmaker Ken Burns, was in development for six years.