1) Football, 3 p.m. ET, Fox; 6:40 p.m., CBS. The conference-championship games start with two of the all-time great quarterbacks: Aaron Rodgers (shown here) and the Packers host Tom Brady and the Bucs. Combined, those men are 80 years old and (counting post-season) have passed for 1,128 touchdowns, 333 interceptions and 50,462 yards. One will go to the Super Bowl, facing the winner of the game between the Chiefs (hoping quarterback Patrick Mahomes has recovered) and the Bills.
2) “Batwoman,” 8 p.m., CW. Last week’s season-opener found a terrific way to deal with the fact that its star (Ruby Rose) had quit. Instead of copying Rose’s character – Kate Kane, secretly Batwoman – the show went the opposite way: Ryan Wilder (the terrific Javicia Leslie) is an unemployed martial arts instructor, an ex-con who says she was framed. She found the potent batsuit. Tonight – in another excellent hour – Alice pushes her evil plan and Ryan consider stepping back into the suit.
3) “All Creatures Great and Small,” 9 p.m., PBS. Yes, this is mostly a feel-good story of well-meaning people in rural England of the past. Its people have charming (mostly) quirks. But it can get serious, and this episode does: A seriously ill horse leaves James (and, later, his boss) with an ethical crisis. The result is told with depth and a fondness for the characters.
4) “Avengers” films. Two powerhouse movies bump against each other: “Endgame” (2019) is 8 p.m. on TNT, following the second day of a “Star Wars” marathon; “Age of Ultron” (2015) is 8:30 on Syfy. Also, TBS has “Crazy Rich Asians” (2018) – so-so story, but stylish production – at 5:30 p.m. and the beautifully crafted “A Star Is Born” (2018) at 8.
5) Also: It’s a day of witches. AMC reruns the first season of “Discovery of Witches” at 1:25 p.m., then starts the new season at 10, setting it in 1590 London. (That has already started on Shudder and Sundance Now.) And CW has the “Charmed” season-opener, at 9 p.m.