1) “Perfect Harmony,” 8:30 p.m., NBC. This may be the first time we’ve seen a small church choir belt out “We Are the Champions,” celebrating a trophy for being most improved. “Harmony” is like that, pulling odd twists. Bradley Whitford, already a triple Emmy-winner, provides the core as a crabby choirmaster, but others are also first-rate. Tonight, Ginny (Anna Camp, shown here) unleashes her inner Dolly. And Spencer Allport, as her son, has some droll lines, sort of like Jake in early “Two and a Half Men.”
2) More comedy. Somehow, Thursday became laugh night. There are four comedies on CBS (including the quiet fun of “Young Sheldon” at 8 p.m. and the noisy fun of “Mom” at 9) and four on NBC. After “Superstore” and “Perfect Harmony,” NBC has “The Good Place” and “Sunnyside” at 9 and 9:30. Both are inconsistent tonight, but “Good Place” redeems itself with sheer inventiveness.
3) “Legacies” season-opener, 9 p.m., CW. Right after the 15th and final season of “Supernatural” begins, we get the start of the second “Legacies” season. It’s summertime, when these teens should be partying at the beach. Except that Hope has plunged into a black pit to save her friends; if she gets out, their memories of her will be erased. And Raf has turned into a perma-wolf; only Hope can save him. And the twins are fretting about merging, when one may have to die. It’s all well-made and ominous.
4) “Doc Martin,” any time, www.acorn.tv. A delightful moment came two weeks ago, when Al (the local pub owner) accidentally proposed to Morwenna (the doctor’s receptionist). She said yes, people cheered and he was a bit startled. Now he’s ready to re-propose correctly; that falls on a day the doctor doesn’t want to acknowledge – his 60th birthday. Stir in more elements – his mother’s memory problems plus a wayward seal – and you have a terrific episode.
5) “Temptation Island” opener, 10:01 p.m., USA. We start with four couples, then plunge them into temptation. They split up and go to a resort where, USA says, “24 sexy single men and women” await. Yes, this been tried before: Fox ran the series in 2001 (twice) and 2003, then dumped it; USA revived it in January. Fox also had the similar “Paradise Hotel” in 2003 and 2008; it brought it back this summer … and cancelled it again. CBS, however, will return “Love Island” next summer.