1) “The Beast Must Die” opener, 10 p.m., AMC. Americans know Cush Jumbo from “The Good Wife” and “The Good Fight,” but now she’s back in England for a sensational performance. She plays a teacher whose 6-year-old son was killed by a hit-and-run driver. The cop working the case died; his replacement (well-played by Billy Howle) is sincere, but overwhelmed. With a new look (shown here), she’ll investigate, even infiltrating the world of the prime suspect. It’s a powerful, six-week series.
2) “Young Sheldon,” 9 p.m., CBS. There aren’t many situation comedies this summer, but athey’re bunched conveniently. Beginning tonight, CBS moves “Young Sheldon” and “United States of Al” here, creatng a four-sitcom-rerun block with “The Neighborhood” and “Bob (Hearts) Abishola”; ABC has a similar block on Tuesdays. Tonight, Sheldon” has Dungeons & Dragons night and Al is homesick for Afghan traditions.
3) Shark stuff, cable. Discovery has just launched its annual Shark Week, which continues through Sunday, sometimes with starpower. At 7 p.m. today, Tiffany Haddish examines shark sex and moe; at 11:03 p.m., Josh Gates’ nightly talkshow has William Shatner, Brad Paisley and Robert Irwin. Meanwhile, “SharkFest” continues on National Geographic. At 10 p.m., Paige Winters – a teen whose red/blue hair reflects her upbeat attitude – describes losing a leg (and almost her life) in an attack.
4) “Jack Irish” and “Ms. Fisher’s Modern Murder Mysteries,” any time, www.acorn.tv. These Australian tales are exact opposites. “Ms. Fisher” is light and bright, glowing with the fashions and moods of 1964; even when its mystery is lame – as this one, the seventh of eight this season, is — it’s still fun. “Irish” isn’t; this hour (starting a four-week story), has two suicides by handgun. Jack, well-played by Guy Pearce, is a sometimes-lawyer, widowed, broke and tackling a personal mystery.
5) ALSO: There’s the usual reality-show clash at 8 p.m., with ABC’s “The Bachelorette,” NBC’s “American Ninja Warrior” and Fox’s “Hell’s Kitchen.” That last one leads into the clever “Housebroken” cartoon at 9. Tonight, there’s a bachelor party for Shel the turtle.