1) “Grantchester” season-finale, 9-11 p.m., PBS. The eighth season has been the best one yet, solving smart mysteries while dealing with deep personal problems. Will has wallowed in guilt, since killing a man who ran in front of his motorcycle. Geordie has an arrogant new boss; also, Bonnie (Will’s pregnant wife) and Leonard (his former assistant, shown here with Will, center, and Will’s housekeeper) despair. Now some of that is resolved, while two more mysteries are solved.
2) “Ridley” finale, 8 p.m., PBS. The bad news is that the mystery is so-so and is settled fairly early. The good is that this leaves more room for warm layers of emotion. Ridley is a retired cop who sometimes sings at a bar he co-owns. His stoic exterior covers rage and pain, in the aftermath of arson that killed his wife and daughter. Now some of that is resolved.
3) Drama season-openers, 9 p.m., premium cable. HBO starts the second season of “Winning Time,” the story of the Los Angeles Lakers in the Magic era. And Showtime start the sixth season of “The Chi”; Emmet and Kiesha struggle with his determination to expand his restaurant.
4) “Dark Winds,” 9 p.m., AMC. In last week’s opener, Joe Lephorn (a Navajo cop) and Jim Chee (his his former deputy, a private eye) faced heavy rifle fire. Now Chee is severely wounded, far from any help. This episode – the second of six in a smart and stoic mini-series – is set at the time of the 1969 moon landing. It’s followed at 10:05 by the start of “Black Snow,” an Australian murder mini-series.
5) ALSO: “Big Brother” moves into CBS’ 8 p.m. slot; “Tough as Nails,” which was there, has finished its season. The “Equalizer” and “NCIS: Los Angeles reruns remain at 9 and 10. And after lots of sports pre-emptions, Fox is back to its Sunday cartoons. It has reruns of “The Simpsons” (Milhouse’s dad wants to control the school curriculum) and “Family Guy” at 8 and 8:30, followed by new episodes of the witty “HouseBroken.”