Muhammad Ali’s Greatest Fight, starring Christopher Plummer, Frank Langella and Benjamin Walker, will debut on Saturday, October 5 at 8 PM on HBO. Directed by Stephen Frears from a script by Shawn Slovo, Muhammad Ali’s Greatest Fight, dramatizes the machinations of the Supreme Court as Ali pursued Conscientious Objector status. HBO Films is producing in association with SAF Films West. Frank Doelger, Tracey Scoffield, Jonathan Cameron and Frears are executive producers.