1) “The Simpsons,” 8 p.m., Fox. Last week, “Simpsons” took a slight detour, with a half-hour take-off on “It.” Now it’s back for the 33rd – yes, 33rd – annual “Treehouse of Horrors,” with three wonderfully weird stories. There are take-offs on two films — “The Babadook” and (in a charming anime style, shown here) “Death Note,” plus a “Westworld” that actually has a heroic Homer. The results are too gory for some viewers, but a delight for others.
2) More Halloween-type animation, 8:30-10 p.m., Fox. Three other shows have mixed results. The best is “Bob’s Burgers” (9 p.m.), linking two school events – Bob joins an ominous apple-orchard field trip, while Linda makes frantic repairs for the costume parade. On “The Great North” (8:30), Honeybee is eager to get back home for a big holiday. On “Family Guy,” Peter learns a crucial lesson: Never make a clone or hologram that’s better than you.
3) “White Lotus” season-opener, 9 p.m., HBO, rerunning at 10:02 and 11:40. The first season won 10 Emmys, including best mini-series; writer-director-producer Mike White won tree times. Now he has a seven-episode second season. This time, the comedy-drama is at a resort in Sicily. Jennifer Coolidge, who won an Emmy the first season, returns, with Jon Gries back as her lover. Others, from Aubrey Plaza to Michael Imperioli, are new.
4) Season finales, cable. While “Lotus” starts its season, two other shows end theirs. At 8 p.m. on Starz (rerunning at 10:28 p.m. and 12:55 a.m.) is “The Serpent Queen,” with Catherine scheming. At 9 p.m. on Epix (rerunning at 11 p.m. and 1 a.m.) is “War of the Worlds,” with Bill trying to save the world.
5) “NCIS: Los Angeles,” 9 p.m., CBS. “The Equalizer” gets a week off, shifting everyone. “East New York” moves to 8 p.m. and “Fire Country” reruns its pilot (a pretty good one) at 10. In between is this show, with a personal story: When Sam’s son Aiden is suspected of pilot error, two probes begin – one by the NCIS, another by Sam, Aiden and Sam’s dad, a Marine veteran.