Under Salt Marsh
9pm, Sky Atlantic
An engrossing crime drama that makes the most of its rugged Welsh coastal backdrop, complete with sheep running through the pub and cosy cardigans aplenty. Yellowstone’s Kelly Reilly leads the (not very Welsh) cast as Jackie, a pensive detective turned teacher with permanent bed hair. When she finds the body of her pupil in a ditch, her former colleague detective Eric Bull (Rafe Spall) arrives on the scene, still disturbed by the cold case that forced Jackie to leave the force three years earlier. Are the two crimes connected? Throw into the mix an impending killer storm and Jackie’s secret lover played by Harry Lawtey, and it makes for perfect winter telly. Hollie Richardson
Monty Don’s Rhineland Gardens
7pm, BBC Two
Monty’s tour of the gardens along the Rhine has been driven by passion. As he enters the Netherlands in the final episode, he continues to meet people whose enthusiasm matches his own. He explores the impact of the river on Dutch life and visits the biggest display of tulips in the world. Phil Harrison
David Baddiel: Cat Man
8pm, Channel 4
It’s the finale of this charming series that sees the comic wondering why dogs hog the airwaves. Baddiel meets remarkable moggies that have saved their owners’ lives. Plus, he extols the idea that cats are great pets for men. Or as one interviewee puts it: “A man with a cat is a more rounded person.” Alexi Duggins
Devil in Disguise: John Wayne Gacy
9pm, ITV1
A completely bleak drama based on John Wayne Gacy, a “pillar of the community”, who dressed like a clown to entertain sick children – but murdered 33 young men and boys and buried them under his home. Showrunner Patrick Macmanus promises the victims are at the heart of the show, but it starts with the days leading to the police’s grim discovery. HR
Death in Paradise
9pm, BBC One
Selwyn’s (Don Warrington) plane has only just touched down in Saint Marie when there’s another death to investigate. A man has fallen from the roof of Government House – but did he jump, or was he pushed? DI Mervin Wilson (Don Gilet) is on the case, if only slightly distracted by meeting his long-lost half-brother. Ellen E Jones
The Graham Norton Show
10.40pm, BBC One
Some of Hollywood’s hottest – Halle Berry, Chris Hemsworth and Rachel McAdams – huddle on Graham’s red sofa this week, ready to let slip some anecdotes. Plus, John Bishop discusses the film based on his life and directed by Bradley Cooper. HR
Film choice
The Naked Gun (2025, Akiva Schaffer), 9.10am, Sky Cinema Premiere
If you like your comedy silly and your beavers stuffed, good news: last year’s well-received reboot of the law enforcement farce is getting its UK TV premiere, now starring Liam Neeson as Lt Frank Drebin Jr, son of the original Leslie Nielsen character. When the “Primordial Law of Toughness” gadget (or “P.L.O.T. Device”, for short) gets stolen from a safety deposit box, Drebin teams up with crime novelist Beth (Pamela Anderson) to foil the bad guys – plus one bad snowman – and restore order to the streets of LA. EEJ
