Today's TV: Shocking truth of waste plus join Masterchef and Harry Hill

RECYCLING is all the rage these days. We’re all asked to separate the stuff that could be repurposed from the general waste we throw out every week, but what happens to it once the refuse collectors have taken it away? Environmental journalist Lucy Siegle tries to answer that question in an eye-opening report – and what she comes up with will probably shock many viewers. She’s found evidence to suggest that rather than being reused somehow, millions of tonnes of recycling is merely burnt, which in turn causes a rise in carbon emissions.

Would I lie to you?

Would I Lie to You? (BBC1, regions vary)

The comedy panel show never fails to raise a smile. The current series has been its 14th, and while you imagine that long-running team captains David Mitchell and Lee Mack’s store of fibs is getting low, there seems to be plenty of mileage in the format yet. The series draws to a close next week, so its makers are taking the time to show us some previously unseen footage that didn’t quite make it into the weekly show. We’re going to be very disappointed if top guest Bob Mortimer doesn’t make an appearance at some point.

Unforgotten

Unforgotten (ITV, 9pm)

Andrews may not be convinced that there is enough evidence to tie four police officers to the Walsh murder, but Cassie is. She and Sunny begin interviewing the group, which takes some time – they’re now spread across the country. In Cambridge Cassie questions Liz, who claims she doesn’t recognise either the dead man or Fogerty, in whose car she was supposedly travelling on that fateful night. Meanwhile, in the Peak District, Sunny puts an agitated Fiona under the microscope; she says she doesn’t recognise the victim but vaguely remembers Fogerty. The detectives draw similar responses from both Ram and Dean. Suddenly, after seemingly being within touching distance of finding the killer, the duo have more questions than answers – and they still don’t have the rest of the body, which could contain vital clues.

The Story of Welsh Art

The Story of Welsh Art (BBC Four, 9pm)

Broadcaster Huw Stephens, who recently won a Bafta Cymru award for his documentary exploring the Welsh music scene, continues to take viewers on a breath-taking visual tour of the nation. In the second episode, he explores how, from the 18th-century, the dramatic landscape of Wales captivated artists like Richard Wilson and JMW Turner, who painted it in ways that changed the course of art history. Huw also discovers the work of Penry Williams, a Merthyr Tydfil artist who was commissioned to paint his home town’s vast Cyfarthfa ironworks.

MasterChef

MasterChef (BBC1, 9pm)

Another week, another set of talented amateur chefs enter the infamous kitchen in which dreams can come true – or be left shattered like a broken plate. The astounding thing about MasterChef is that despite the fact it’s been back on our screens for the past 16 years, the standard of cooking just keeps getting better and better. Last week’s opening episode featured some amazing dishes, the kind of that many of us could only dream about being able to make. Will the latest bunch prove to be just as impressive, or were their predecessors particularly gifted? We’re about to find out as they try to impress judges John Torode and Gregg Wallace, who will be setting them more fiendishly tricky challenges. The run continues on Thursday and Friday.

Harry Hill’s Lonely Island

Harry Hill’s Lonely Island (BBC2, 10.40pm)

Last year, the big-collared funnyman brightened up our lockdown experience by making a memorable appearance on Grayson’s Art Club and fronting his own World of TV series, in which he poked fun at various programmes and genres. Now he’s back in a quartet of short and silent black and white comedy shows. Hill has written and directed each of them; he also pops up in leading roles. They are all set in a different historical period, from prehistoric times to the Napoleonic era, and we can’t wait to see what his surreal and highly amusing brain has devised for us.