1) “So You Think You Can Dance” opener, 9 p.m., Fox. From its debut in 2005, “Dance” (shown here in a previous season) has been one of TV’s best reality competitions. It had great dancers and (after the auditions) gifted choreographers; it also had a producer and head judge (Nigel Lythgoe) who took this seriously. Now the show is back (for the first time in three years), but its leader isn’t. Lythgoe, 72, is out; JoJo Siwa, who turns 19 on Thursday, is one of the judges, alongside Matthew Morrison (“Glee”) and Stephen “tWitch” Boss.
2) “The Masked Singer” finale, 8 p.m., Fox. It’s been a weird season, unmasking lots of non-singers — including Joe Buck, Dog the Bounty Hunter and even Rudy Giuliani. But a few talents have also been ousted – Jennifer Holliday, Shaggy and En Vogue. Now the final three – disguised as Firefly, Prince and Ringmaster – remain.
3) “Beyond the Edge” finale, 9-11 p.m., CBS.”Survivor” (8 p.m.) wraps up next week, but “Edge” ends now. In the Panama jungle, things have gone as viewers might have predicted: The only people to persist have backgrounds in military (Craig Morgan) or football (Ray Lewis, Colton Underwood, Mike Singletary). Jodi Sweetin left last week, Paulina Porizkova a week before that. Earlier, Eboni Williams and Lauren Alaina left with medical troubles; Metta World Peace left in the second episode.
4) More finales, ABC.”The Conner” plans a triple wedding – Darlene, at the same time as her daughter and her aunt … unless things fall through. That’s at 9 p.m., afger end-of-school-year episodes of “The Goldbergs” (Adam finishes high school) and “The Wonder Years.” On “Home Economics” at 9:30, Conner considers a million-dollar space ride; on “A Million Little Things” at 10, there’s more trouble for Maggie and Gary
5) Colombia – Wild and Free,” 10 p.m., PBS. As drug wars diminish, this film says, people re-discover Colombia’s immense beauty. The first half of this film has great glimpses, from woolly monkeys to six-foot otters to a bird’s dazzling mating dance. The second half also meets the Amazon’s indigenous people … and sees cliff paintings, made millennia ago, that the outside world didn’t find until 2016. American viewers may have trouble with the pronunciations of the wordy narration, but it’s worth the effort.