TV tonight: a relaxing art competition in the Lake District | Television

Landscape Artist of the Year 2026

8pm, Sky Arts
Derwentwater, known as the “queen of the Lakes”, is home to the world’s biggest colouring pencil – at the Derwent Pencil Museum in Keswick – and is the starting point for this year’s art competition. Stephen Mangan is back on warming hosting duties, as some artists beg for the sunlight to hit the water as they get to work on their paintings. The first artist is chosen for the semi-finals – along with a wildcard painter – but will you agree with the judges’ decisions? Hollie Richardson

How to Keep Your Brain Young

7pm, Channel 5
Are you worried about your memory? Do you think you’re scrolling too much? Dr Amir Khan follows three volunteers with relatable worries about their brains and puts new research and lifestyle tips to the test with two-week challenges. He also speaks to experts about spotting early onset dementia and treating addiction and depression. HR

The Traitors

8pm, BBC One
More stabs in the dark and autopsies over breakfast as the cloak-and-dagger mega-hit reaches week three. Hopefully by now both viewers and the surviving Traitors have made peace with the new gimmicks and remixed ruleset. But after such an incident-packed first half of the series are there more twists to come? Graeme Virtue

Digging for Britain

9pm, BBC Two

This episode of the wholesome annual archaeology series involves what presenter Prof Alice Roberts describes as “a once-in-a-lifetime find”. The team are just outside Thetford in Norfolk – on a prospective housing development site that was once home to Queen Boudicca. The excitement is infectious as something very unusual emerges from the mud. Phil Harrison

Matlock

9pm, Sky Witness

The soapy but satisfying legal drama continues its second season, with further jousting between wily veteran Matty (Kathy Bates) and ambitious high-flyer Olympia (Skye P Marshall). This week, can either of them successfully blackmail the other or coerce them by sending damaging leaked info to the New York Times? Jack Seale

Can You Keep a Secret?

9.30pm, BBC One
Devious fun in the new sitcom from the people behind Ghosts and This Country. Dawn French is having a ball as kooky widow Debbie, who has just told her anxious son Harry (Craig Roberts) that her husband William (Mark Heap) faked his own death. But can she persuade Harry not to tell his police officer wife? HR