Valerie volunteers to be a mascot whilst Jimmi wonders what's next for him and Maeve. Diarmud has won the final commission for the Letherbridge sculpture trail, but he is caught in acrimonious differences of artistic opinion with his partner Patsy.

Anne Robinson and Rachel Riley host the words-and-numbers game where contestants pit their wits against the clock. Robert Hardman is in Dictionary Corner with Susie Dent.

Somerset is the destination today, where Alistair Appleton is helping an industrious young couple from Hertfordshire who are eager to make a rural move to the county.

In the home of cheddar cheese, Alistair investigates innovations to complement that dairy tradition when he visits a local producer who specialises in vegan cheese.

Miranda and Andrew's garden in Ledbury is a mass of concrete, devoid of plants. They would love an Italian courtyard, reminiscent of their 25th wedding anniversary in Tuscany. For £4,000, Charlie and Lee make the couple's Mediterranean dreams come true.

Alex takes her dog Elliott to a canine spa for some all-over grooming, while the programme catches up with Sue and the gang at the Marina Alta Breast Support charity.

Tim and Rebecca are coming to the end of their two-year gîte project, while Tim and Krys press on with their formal garden and tennis court restoration.

When Neel's new flying invention gets a mysterious hole during a big royal event, Mira must figure out what happened before it's too late.

Studio manager Sam hosts the first of five dinner parties in Sheffield, serving up an evening dedicated to Mizoram cooking, that is inspired by her late grandmother.

Bradley Walsh presents as contestants Chris, Callum, Sue and Emily pit their wits against one of the ruthless Chasers in the hope of winning a potential prize pot worth thousands of pounds. They work as a team and play strategically to answer general knowledge questions against the clock and race down the game board to the exit without being caught.

Ant and Fontaine realise their grandparents found Lemuria before them - but where are they now? The Nektons follow the trail they left but run into giant, predatory Sand Strikers! Was this the fate of their grandparents?

Stacey's denial finally catches up to her, with serious consequences. Rainie refuses to face the reality of Stuart's feelings, and Sam continues to gloat at Denise's misfortune.

The live semi-finals will welcome back the acts who impressed the judges as well as our golden buzzer performers, singer Loren Allred; comedian Axel Blake; dancers Born to Perform; magician Keiichi Iwasaki and singer/songwriter and musician Flintz & T4ylor.

Ant and Dec will host the semi-finals while Simon Cowell, Amanda Holden, Alesha Dixon and David Walliams return to the judges' desk. Eight contestants will perform in each live semi-final. The first finalist is chosen via public vote and the second finalist will be chosen by the judges.

Jimmy Doherty travels to Thailand to discover why coriander is the herb of choice for some, but for others it seems to taste like soap. Matt Tebbutt is in Spain learning why some oranges are so hard to peel, and Briony Williams interrogates an important kitchen conundrum: Why dropped toast always lands the wrong side down.

Hartwood, a haunting facility in Scotland [pictured], the ruins of an iconic ancient city in Iraq, a scandal hit town in New Mexico, and a German factory that changed the face of the Western home.

Just outside Manchester, patrollers Victoria and Darren fight their way through heavy traffic to reach a high-speed crash on the M62. It's a pile-up with 15 people involved, nine wrecked cars — and one of them spilling fuel onto the motorway. The M62 is blocked, they have more than a thousand cars trapped behind the crash site, and the jam is growing by the minute. In a major incident like this, the M62 won't be back up to full speed until the early hours of the morning. Patrollers Adam and David are looking for anything that could be a hazard to high-speed traffic. Debris on the roads causes thousands of accidents a year, and today they find a garden fork, then a spade, followed by an entire garden shed in the middle of the M62! A simple breakdown on the hard shoulder becomes a tiring afternoon for one lone motorbiker, who is determined to push his machine all the way home. But it's four miles to the nearest exit, so with the added danger of being hit by a passing lorry, the traffic officers decide to escort him until he gets off the motorway. And a diesel spillage on a major interchange of the M62 near Bradford causes chaos. With one car already skidded off the roundabout, Adam and David must close the junction. But with 5,000 vehicles an hour diverted, not everyone is happy and one lorry driver attempts to drive through the road block.

Niall McLaughlin's design for the library at Magdalene College, Cambridge, which has been strongly influenced by requirements to passively light and naturally ventilate the spaces.

Springwatch is back to wrap us in the comfort blanket that only the natural world can bring. Sit back and relax as we showcase the very best of the season's wildlife across the UK.

Chris Packham and Michaela Strachan bring us an abundance of live nest cameras, and all the spring dramas that come with them, from Wild Ken Hill in Norfolk. Iolo Williams returns to the Isle of Mull to delights us with eagles, otters and orca, while Megan McCubbin will be taking us on a spring road trip around the north east of England, visiting Kielder Forest, Hauxley Nature Reserve and Newcastle city centre to reveal the wildlife that call these places home in spring.

The judges head east to assess a colourful new build in Dundee, a sleek self-designed family home in Inverurie and a one-of-a-kind water tank that's been transformed into a dream family home.

Having found out that James had cheated, an unsettled Maeva is left unsure about their future. Julius offers his life coaching services to Inga and encourages her to move on.

A man asks Angus Ashworth to clear his late father's home, which is packed with unusual items from East Asia, but some forgotten toys are the stars at auction.

Shoba and Amarinder are the target of an elaborate sting devised at Hunter HQ. Housemates James and Nathan have evaded the hunters so far by avoiding using technology, depending on their deaf network. But the hunters have a plan to force the guys out of hiding using James' beloved dog. With their mum's 60th birthday coming up, Abi and Grace risk all to get closer to her.

Rick Edwards and Beau Ouimette look for evidence of Roman life in Scotland, heading to Ardoch Fort in Perthshire, on the east bank of the River Knaik. It spans over eight and a half acres and was built under Agricola around 80AD on the east bank of the River Knaik. The fort occupied a key strategic route through Perthshire and into north-east Scotland from the First to Third centuries.

When a woman confesses to murdering her husband, the Lyell team must determine if all is as it seems. Meanwhile, Simone is shocked to be reunited with a detective from her childhood, and struggles to untangle her past.

Let Sandi Toksvig bring you to your senses with Aisling Bea, Roisin Conaty, Jessica Fostekew and Alan Davies.

A derailed Alex promises to accompany Karen to her 12-week scan - but will he make it in time..? Meanwhile, Mulvaney's struggle to adapt to civilian life is compounded when he requires medical intervention, and Maggie bonds with Sonny when she assists him on a project for Molly's Corner.