Tonight TV: Angry drama about water companies dumping raw sewage | television

Dirty business

9pm on Channel 4
In 1999, eight-year-old Heather Breen died after contracting E. coli while playing on the beach. Twenty years later, two men in Oxfordshire called their water company and asked about dead fish in the local river. This stunning three-part drama is based on a decade-long investigation into England’s water companies dumping raw sewage. It will leave the nation desperately demanding answers. Jason Watkins, David Thewlis, Asim Chowdhury and Pussy Sterling star. Holly Richardson

Bear Grylls: Wild Reckoning

2pm, BBC One
A strange series in which Bear Grylls tries to solve emotional problems through external challenges. Mario is worried that his 18-year-old son, Xavier, has gone off the rails. What better way to address this problem than by climbing a steep cliff face? Phil Harrison

Artificial Intelligence is Secret with Hannah Fry

9pm on BBC Two
The public view of artificial intelligence is a dangerous mix of deep concern and scant understanding, but few people are better placed to fill such gaps than expert science explainer Professor Hannah Fry. She first describes how LLMs (large language models, or devices you can chat with) work, and identifies their fatal flaw: they tell you what you want to hear. Jack Seale

Knight of the Seven Kingdoms

9pm, Sky Atlantic

The refreshing, low-key thriller of Game of Thrones revolves around naïve knight-wannabe Dunk and his sharp young guardian Egg, navigating a raucous jousting tournament is rough, funny, violent, and emotionally poignant. After the Targaryen’s messy tangle in the Dunk combat trial, can this ending survive the drop? JV

Minor Prophets

10pm on BBC Two
The third episode of Mackenzie Crook’s strange and endearing comedy-drama about a man who tries to grow tiny people in pots who can – just maybe – help him figure out what happened to his missing girlfriend. As the homunculi project gets underway, Michael lets his co-worker Casey take a peek. Hannah J. Davis

industry

10.40pm, on BBC One
Labor politicians have been dragged down by their unsavory connections and hanging on by a thread – no, it’s not Newsnight, but the penultimate episode of the industry’s epic fourth season. With MP Jenny feeling the pinch of her connection to Tender, Yasmine goes to a specialist to “help” her. HCD

Live sports

Women’s FA Cup Football: London City Lions vs Tottenham Hotspur, 7pm, on TNT Sports 1 at Copperjacks Community Playground.