1) “A Merry Scottish Christmas,” 8-10 p.m., Hallmark. For six years, Lacey Chabert and Scott Wolf (shown here) were “Party of Five” siblings. Now they do it again, in her domain; this is at least Chabert’s 17th Christmas movie. This one, filmed in Scotland, has them visit their estranged mother, who has a secret.
2) More Christmas movies. Lifetime jumps in with a dozen new ones this year. That starts with “Christmas Plus One,” at 8 p.m.; sisters vow to be married by the next Christmas. Great American Family– which has 20 new Christmas films – counters with “Santa, Maybe,” at 8 p.m. ET: A theater director struggles to put on a perfect ballet, while trying to figure out who is her “secret Santa.”
3) “Saturday Night Live,” 11:29 p.m., NBC. For the fifth time in six weeks, “SNL” has a new episode. This one is the second hosting turn for Jason Momoa, whose Aquaman movie arrives Dec. 22. Tate McRae, 20, is the music guest. Originally a dancer (at 13, the first Canadian woman to reach the finals of “So You Think You Can Dance”), she reached the Billboard top-20 with “You Broke Me First.”
4) “Planet Earth IiI,” 8 p.m., BBC America. Tonight’s early scenes, beautifully filmed in deserts, skirt at the edge of heartbreak. An ostrich hatches, just minutes after its family had to leave to seek shade … A baboon mom is desperate to find water so she can feed her baby … A bird prepares the perfect love nest, aware that females refuse romance during a drought. After that, some grasslands scenes have more beauty and fewer worries
5) ALSO: College football fills prime time on ABC, NBC, Fox and CW. The best match-up might be at 7:30 p.m. ET on ABC, with Washington (ranked No. 5) at Oregon State (No. 11). CBS counters with an “NCIS: Hawaii” rerun at 8 p.m. (the team rushes to find the source of fentanyl that killed a Marine corporal), with “48 Hours” at 9 and 10.