SUNDAY: The British nobility won’t know what hit them. Having conquered New York society, nouveau riche powerhouse Bertha Russell (Carrie Coon) descends upon Sidmouth Castle in England. Her mission: to assess the state of her daughter Gladys’ (Taissa Farmiga) new marriage to the meek Duke of Buckingham (Ben Lamb), who seems unwilling to assert his and his bride’s authority over his imperious sister, Lady Sarah (Hattie Morahan). Bertha will see to that, but is there any way to turn this arranged union into a love match? Back in the states, there’s no love lost between her husband George Russell (Morgan Spector) and the power brokers deciding the future of America’s railroads. Subplots include footman Jack (Ben Ahlers) deciding his future after his big payday, Marion (Louisa Jacobsen) reeling from Larry’s (Harry Richardson) deception, and Peggy (Denée Benton) regretting inviting the stuffy Mrs. Kirkland (Phylicia Rashad) to a suffrage meeting.

SUNDAY: Over five hours (continuing Monday with the fourth the fifth episodes), a powerful docuseries directed by Traci A. Curry (Attica) relives the personal horrors and systemic failures of Hurricane Katrina and its aftermath, 20 years ago in August 2005. First-person eyewitness accounts and archival footage reveal the devastation of the flooding in New Orleans and the human suffering as well as heroism when rescue efforts stalled, leaving thousands stranded as the world watched in horror.

SUNDAY: Go bananas with the playful Savannah Bananas, the barnstorming novelty baseball team that has taken the sports world, and TV, by storm. Featured on 60 Minutes and showcased on ESPN, the team makes its broadcast-TV debut (at 3/2c) before a sold-out crowd at Philadelphia’s Citizens Bank Park, taking on the Texas Tailgaters. If you’ve yet to witness their antics, involving elaborate choreography, flaming bats and midgame celebrations, you’re in for a treat.

SUNDAY: How could this grueling franchise become even more extreme? In the latest brand extension, 12 unburdened-by-clothing survivalists are dropped into an apocalyptic and steamy South African wasteland of abandoned ruins and predatory wildlife. Four teams navigate areas including a mine shaft, a cemetery, a ghost town and a vehicle graveyard to scavenge for resources while trying not to inflict damage from broken glass and rusted machinery. Unlike past editions, the participants won’t be extracted but have to find their way back to civilization to complete the challenge. Sounds like fun!

SUNDAY: The diverting underwater fantasy has a new mystery to explore, after the crew of the submersible Nautilus rescues Humility (Georgia Flood) from the ocean’s depths and she reveals she may have spotted the remnants of the lost city of Atlantis. This being an obsession of resident scientist Benoit (Thierry Frémont), he overrides Capt. Nemo’s (Shazad Latif) objections, and an away team dives into the dangerous waters to explore the ancient ruins.

INSIDE WEEKEND TV:

• Attack of the Devil Shark (Saturday, 8/7c, Discovery): Shark Week concludes with the search for a killer shark off the waters of St. Martin, followed by Battle for Shark Mountain (9/8c), which depicts a showdown between sharks and giant trevally fish on the Mozambique coast.
• Unwrapping Christmas: Olivia’s Reunion (Saturday, 8/7c, Hallmark Channel): A gift for those who celebrate Christmas year-round, this heartwarmer stars channel fave Cindy Busby as a professional gift wrapper stranded during a blizzard in a remote cabin with her ex-boyfriend Benjamin (Jake Epstein).
• House of Svengoolie (Saturday, 8/7c, MeTV): The Sven Squad takes over the dungeon for a first-time screening of 1998’s campy Earth Girls Are Easy.
• Before Your Father Finds Us (Saturday, 8/7c, Lifetime): Alexa PenaVega stars in a melodrama as a wife and mom living in witness protection after testifying against her criminal husband (Tahmoh Penikett), whose escape from a maximum-security prison years later upends her life yet again.
• Bugs Bunny’s Birthday Bash (Sunday, 6 am/5c, MeTV Toons): A 24-hour marathon of cartoons and specials marks the animated icon’s 85^th Highlights include encore airings of the original documentary Hare’s to Bugs! A Bugs Bunny Celebration at 1 pm/12c and 8/7c.
• CBS News Sunday Morning (Sunday, 9 am/8c, CBS, check local listings): Segments include Jim Axelrod’s profile of late-night legend Johnny Carson.
• Ozzy Osbourne: Black Sabbath Frontman (Sunday, 9/8c, 6 pm/PT, Reelz): A 2021 documentary relives the raucous life and career of Ozzy Osbourne, who passed away Tuesday at 76. Followed by Black Sabbath: Breaking the Band, a profile of the heavy metal pioneers.
• Grantchester (Sunday, 9/8c, PBS): Cathy (Kacey Ainsworth) and Mrs. C (Tessa Peake-Jones) race against the clock to open their boutique, but a dead body in the back room could spoil their plans. This mystery isn’t the only puzzle occupying Cathy’s husband, DI Geordie Keating (Robson Green), who defies Alphy’s (Rishi Nair) wishes and snoops into the identity of the vicar’s biological mother.
• How Did They Build That? (Sunday, 9/8c, Smithsonian Channel): The Season 4 premiere details the creation of the International Space Station.
• In the Eye of the Storm (Sunday, 10/9c, Discovery): The docuseries’ second season opens with an account of a monster storm in 2024 that battered Texas with multiple tornadoes.