Wild Isles (BBC 1//HD | 7:00pm to 8:00pm | Sunday 2nd April 2023)

Freshwater. Series 1, episode 4. The wildlife that lives in Britain’s freshwater environments. Atlantic salmon battle their way upstream in one of the greatest migrations on the planet, beavers slow the flow with their expert dam-building, and toadlets have to cross a killing zone patrolled by carnivorous leeches. Where rivers spread out to form beds of reeds, great crested grebes pair up in courtship ceremonies, and small agile birds of prey swoop low to catch dragonflies.

Cornwall with Simon Reeve (BBC 2/HD | 9:00pm to 10:00pm | Sunday 2nd April 2023)

Simon Reeve’s Return to Cornwall. The explorer goes back to the county as the energy and cost-of-living crisis began to take its toll to find out what life is like for the locals after the summer crowds have gone. Simon examines why Cornwall is one of the most desirable parts of the country and a favourite holiday destination while also being one of the most deprived counties in England.

The Architecture The Railways Built (Yesterday | 8:00pm to 9:00pm | Tuesday 4th April 2023)

Edinburgh. Series 4, episode 6. Tim Dunn explores railway ingenuity at Goole swing bridge in Yorkshire and takes in Edinburgh Waverley from roof to underground vaults.

Race Across the World (BBC 1/HD | 9:00pm to 10:00pm | Wednesday 5th April 2023) ** PICK OF THE WEEK **

The five pairs leave Dawson City and head south to the third checkpoint, 2,700km away in Alberta but the stakes are raised as the team who reach the destination last will be eliminated. Race leaders Trisha and Cathie enjoy a 25-hour lead over their nearest competitors but after hiring a car in the last leg they take a risk on car sharing their way to Alberta. Disaster strikes for Monique who injures herself at the checkpoint causing her and father Ladi a further three-hour delay. Zainib and Mobeen formulate a new strategy and Marc has to face his fears. Forty-five hours behind Trisha and Cathie are Claudia and Kevin, sitting in last place with their no-frills strategy.

Beyond Paradise (BBC 1/HD | 8:00pm to 9:00pm | Friday 7th April 2023)

Reeling from Martha’s decision, Humphrey focuses his attentions on an inexplicable crime. A house has been burgled and all forensic evidence points to one suspect only. The only problem is that this suspect was locked up by Kelby in the station’s police cell. With the arrival of the suspect’s hardnosed lawyer, the team is under pressure to get results but with Humphrey distracted, it falls to Esther to take the lead on this investigation and crack the case. Meanwhile, despite her mother’s protestations, Martha remains firm, however painful it might be. Detective drama, starring Kris Marshall and Sally Bretton.

Late Night Lycett (Channel 4/HD | 10:00pm to 11:05pm | Friday 7th April 2023)

Host Joe Lycett looks back at the biggest news stories, ropes his guests into games and sketches, and offers audience members the chance to win -is own possessions. Plus, he catches up with celebrities and big-name guests from the worlds of comedy, television, music and film in a lively chat show, direct from Birmingham.

All TV guide information taken from DigiGuide — www.getdigiguide.tv/?p=1&r=15119.