1) “Saturday Night Live,” 11:29 p.m., NBC. For the first time, the coronavirus has forced “SNL” to switch to a rerun. Other latenight shows had adjusted, but “SNL” – with reruns already scheduled – wasn’t affected. But it had planned a new episode tonight, with John Krasinski hosting and Dua Lipa as music guest. Instead, this rerun has Scarlett Johansson (shown here) hosting and mocking her fiance, anchor and head writer Colin Jost; Niall Horan is music guest.
2) More changes. This was going to be a big basketball day, with the pros on ABC and the colleges – determining their final four – on TBS. Instead, ABC again has reruns of “Shark Tank” at 8 and “American Idol” at 9; there are “Hollywood Week” solos on “Idol,” which has its own future in limbo after Monday. Meanwhile, TBS reruns some great comedy – four “Big Bang” episodes at 9, Samantha Bee at 11 and the first half of the “Miracle Workers: Dark Ages” finale at 11:30.
3) “NCIS: Los Angeles,” 8 p.m., CBS. The “NCIS” shows started 17 years ago, as a spin-off from “JAG.” The stars of that show returned for this year’s season-opener: Rabb (David James Elliott) captains a ship that may have spies aboard; Mac (Catherine Bell) tries to neutralize a missile attack.
4) “9-1-1,” 9 p.m., Fox. In this rerun, a viral stunt goes bad; so does one couple’s first date and another’s fishing trip. Also, Athena questions a woman who can’t remember being shot in the head.
5) Movies, everywhere. At 8 p.m., families have “Trolls” (2016) on NBC and grown-ups have “The Kitchen” (2019) on HBO. The latter has three women take over the local crime gang; the plot makes it seem way too easy, but there are gifted stars – Elisabeth Moss, Tiffany Haddish and Melissa McCarthy. Also, there are movie series: USA starts Harry Potter films at 10:30 a.m. … E starts “Fast and Furious:” ones at 2:30 p.m. … and AMC starts “Rocky” films at 3 p.m.