1) “Masterpiece: Grantchester” season-finale, 9 p.m., PBS. Set in the late 1950s, this show has been rough on Will (the good-hearted, crimesolving vicar) and friends. His assistant remains in the closet … his housekeeper is appalled by her new husband’s past … his friend the cop (shown hyere with Will in the seas0n-opener) sent his mother-in-law to a mental institution. Will is despondent (his youth boxing program brought trouble) and is voluntarily celibate. Now much of that brightens, amid a smart case that involves murder and missing women.
2) “Masterpiece: Beechham House” season-finale, 10 p.m., PBS. Unlike “Granchester,” this show has suffered from stiff dialog and stiffer acting. It makes up for that (partly) with grand settings and busy plots. Now John is in jail and starting to realize that his friend, Captain Parker, betrayed him. Things get much busier, propelling us toward next season.
3) “World’s Biggest Tiger Shark?” 8 p.m., National Geographic. The annual “Sharkfest” gives us three weeks on this channel and then two more on Nat Geo Wild – beginning the same day (Aug. 9) that Discovery starts Shark Week. Sharkfest opens at 9 a.m. today with reruns and, at times, gore. But at 8 p.m., the first new special is sweet-spirited. Kori Garza is a marine biologist in French Polynesia who can turn sharks away with a tap to the snout. Here, she tries to re-connect with a 16-to-18-foot giant.
4) “The Alienist: Angel of Darkness” opener, 9 and 10 p.m., TNT. The original “Alienist” mini-series had a killer stalking boys in 1890s New York. Police Commissioner Theodore Roosevelt turned to Dr. Kreizler – an “alienist” or psychiatrist – and Sara Moore (Dakota Fanning), the only woman in his department. Now she’s a private eye, consulting Kreizler for a tough case: A Spanish dignitary’s baby was kidnapped. The story is beautifully filmed and acted, but slow (10 episodes) and somber.
5) “United Shades of America,” 10-11:16 p.m., CNN; repeats at 12:16 a.m. Here is perfect timing: As the country gets more serious about race, W. Kamau Bell returns with a show that has always viewed it with depth. In each of its first four seasons, “Shades” drew an Emmy nomination for best unstructured reality show, winning three times. Tonight, Bell catches white-supremacy views in Pittsburgh.