The four-part true crime documentary series “Burden of Proof” (HBO, 9 p.m.) follows Stephen Pandos’ efforts over seven years to find out what happened to a sister that went missing in 1987 at age 15. The parents, who told people she had run away, increasingly look like suspicious. 

A couple of sports documentaries begin tonight. The new five-part series, “Destination: European Nights” (Paramount+, streaming), journalist Guillem Blagué reviews this season’s action in soccer’s UEFA Champions League leading up to the final Saturday. It’s part of the streaming service’s “Stories from the Beautiful Game” series.

The first two episodes of another new limited series “The Luckiest Guy in the World” on “30 for 30” (ESPN, 8 p.m.) focuses on the life of NBA star and Grateful Dead fan Bill Walton. It’s directed by Steve James of “Hoop Dreams.” It winds up next Tuesday. 

The special “The Freedom to Exist — A Soul of a Nation Presentation” (ABC, 10 p.m.) takes a look at the transgender community and includes an interview with the actor Elliot Page. 

A followup to the series “The Secret of Skinwalker Ranch” goes “Beyond Skinwalker Ranch” (History, 10 p.m.), getting more material out of the supposed site of aerial paranormal phenomena in northeast Utah.

“America’s Got Talent” (NBC, 8 p.m.) continues auditions.

Some surprising information emerges from Duela’s birthday reunion with her mother on “Gotham Knights” (CW, 9 p.m.).