MACK WRESTLES 2 p.m. on ESPN and 4:30 p.m. on ABC. This documentary, part of ESPN’s 30 for 30 Shorts series, follows Mack Beggs, a high school wrestler from Euless, Tex., as he navigates the demands of the wrestling world, and the stigma that surrounds transgender athletes. When Beggs started his transition at the end of ninth grade, both his school and his family were supportive. But, because Texas state law prevented Beggs from competing on the boys’ wrestling team, the general public started to have concerns about a male-identifying wrestler competing against girls. After reading an ESPN article about Beggs, the filmmakers Taylor Hess and Erin Sanger set out to make the film, with the hope that it would “give athletes like Mack a platform and “ultimately create a more inclusive space,” Sanger told the Dallas Observer.

THE CIRCUS 8 p.m. on Showtime; Stream on Showtime platforms. Showtime’s most-watched documentary series returns for its fourth season, just as the race for the White House heats up. Co-hosts John Heilemann, Alex Wagner and Mark McKinnon follow the group of Democrats vying to take on President Trump in 2020, as they meet constituents in key states across the country. The hosts also check in with major figures on the right, like Roger Stone and Steve Bannon, and newcomers on the left, including Representative Ilhan Omar and Representative Alexandria Ocasio-Cortez.