The Smithsonian is closed due to the government shutdown anyway, so Kirk Johnson, the director of its National Museum of Natural History, is off to the Arctic to observe the hidden lives of walruses facing climate change on the season 44 premiere of “Nature” (PBS, 8 p.m., check local listings), ( likely shot way before the shutdown).
A new true crime documentary series tracks the battle for control of Philly between two warring mob factions in the 1990s in “Mob War: Philadelphia vs. The Mafia” (Netflix, streaming).
From Chile comes the new series “Baby Bandito” (Netflix, streaming) about a guy who tries to recover lost cash at the National Racetrack in Santiago in order to save his mother’s life, fighting rival gangs along the way.
A new series from Italy dramatizes a 17-year reign of a serial killer, “The Monster of Florence” (Netflix, streaming).
“Nova” (PBS, 9 p.m., check local listings) tries to figure out what thousands of kite-shaped, prehistoric buildings scattered across the Middle East might mean.
Encrypted letters from Mary Queen of Scots are decoded by modern-day code breakers on a new episode of “Secrets of the Dead” (PBS, 10 pm., check local listings).
“Chicago Med” (NBC, 8 p.m.) tries to talk a patient into accepting treatment before it’s too late; “Chicago Fire” (NBC, 9 p.m.) bands together after a devastating fire; and “Chicago P.D.” (NBC, 10 p.m.) looks into a string of violent robberies.
Gregory volunteers to host game night on “Abbott Elementary” (ABC, 8:30 p.m.).
“The Golden Bachelor” (ABC, 9 p.m.) goes to Las Vegas, Denver and Austin for hometown visits. One good thing about dating as his age: He probably won’t have to meet any parents of the final three.
There are just three couples on season nine of “Love is Blind” (Netflix, streaming) going to the altar today for the wedding episode finale. The reunion episode for this Denver-based crew is next week.
A raccoon in the yard becomes a teaching moment on “Shifting Gears” (ABC, 8 p.m.).
“Survivor” (CBS, 8 p.m.) sends two castaways on a difficult journey.
A local journalist is murdered on “Law & Order Toronto: Criminal Intent” (CW, 8 p.m.).
“The Amazing Race” (CBS, 9:30 p.m.) heads to Croatia.
How to handle problems in relationships is considered among “Tyler Perry’s Sistas” (BET, 9 p.m.).
“Basketball Wives” (BET, 8 p.m.) have some fallout to process after the Hawaii trip on .
South African vets and volunteers are among those who “Work on the Wild Side” (Animal Planet, 9 p.m.).
“The Hand that Robs the Cradle” (Lifetime Movie Network, 8 p.m.) is a made-for-TV thriller about a nanny who finds that the child she’s caring for was kidnapped — by the couple claiming to be the parents.
“Shark Tank” (ABC, 10 p.m.) is pitched an airline for pets.
The locations in Bangor, Maine that inspired Stephen King to write “It” are explored on the 10th season finale of “Expedition X” (Discovery, 9 p.m.).
A second season starts for “Dangerously Obese” (TLC, 9 p.m.), a series that may also be Dangerously Exploitive.
“Fatal Engineering” (Science, 9 p.m.) looks at flaws that caused building collapses in London, New Delhi and Tehran.
Turner Classic Movies pays tribute to Connie Francis, who died in July at 87, with “Where the Boys Are” (8 p.m.), “Follow the Boys” (10 p.m.), “Looking for Love” (midnight), “When the Boys Meet the Girls” (1:30 a.m.) and “Jamboree!” (3:30 a.m.).
During the day TCM has all manner of sci-fi horror with “Night of the Lepus” (6 a.m.), “Ebirah, Horror of the Deep” (7:30 a.m.), “The War of the Gargantuas” (9 a.m.), “Destroy All Monsters” (10:30 a.m.), “The Black Scorpion” (12:15 p.m.), “The Beast from 20,000 Fathoms” (3:15 p.m.), “Gojira” (4:45 p.m.) and “Invaders from Mars” (6:30 p.m.).
NBA has Cleveland at Knicks (ESPN, 7 p.m.) and San Antonio at Dallas (ESPN, 9:30 p.m.),
Hockey has Detroit at Buffalo (TNT, truTV, HBO Max, 7:30 p.m.).
College football has Middle Tennessee at Delaware (ESPN2, 7:30 p.m.) and Missouri State at New Mexico State (CBS Sports, 9 p.m.).
Daytime Talk
Kelly Ripa and Mark Consuelos: Allison Williams, Jessica Capshaw. The View: Ethan Hawke, John Grisham. Kelly Clarkson: Ethan Hawke, Renee Elise Goldsberry, John Edward, Brett Young, Liz Parker, Vincent Mason. Drew Barrymore: Lili Reinhart, Sunny Anderson. Jennifer Hudson: Alfre Woodard. Tamron Hall: Veejay Fluoresce, Sonia Hou, Alex Holliman.
Late Talk
Stephen Colbert: Emma Stone, Alex Wagner. Jimmy Kimmel: Emily Blunt, Ebon Moss-Bachrach, Geese, Big Daddy Kane (rerun). Jimmy Fallon: Adam Brody, Gaten Matarazzo, Mark Messier, Courtney Barnett. Seth Meyers: Maya Rudolph, Adam Pally. Daily Show: Ryan Holiday.