Filmmaker Ken Burns is wading into baseball’s steroids era for a postscript to his 1994 PBS documentary about the sport.

The nine-part 1994 series “Baseball” was a refuge for fans during a year the sport was shut down for a strike.

PBS says Burns is following it up with “The Tenth Inning,” a four-hour documentary that will air Sept. 28 and 29, just before playoffs begin.

The film essentially covers Major League baseball since 1994. Covered are the rise in performance-enhancing drugs, the sport’s international flavor because of Asian and Latino players, a new Yankees dynasty and the breakthrough of the Boston Red Sox.

A DVD and Blu-ray disc will be available a week later with two additional hours of material.