“Ali-Frazier 1: ONE NATION ... DIVISIBLE” (7 p.m., HBO Sports): Documentarians explore

“Ali-Frazier 1: ONE NATION ... DIVISIBLE” (7 p.m., HBO Sports): Documentarians explore the early ’70s U.S. cultural divide through the lens of the Muhammad Ali/Joe Frazier heavyweight championship fight.

“NY Med” (10 p.m., ABC): Break out the scrubs. “NY Med,” the reality series about life at Manhattan’s New York-Presbyterian Hospital and Newark’s University Hospital, is back for a second season.

TV listings, B6