Let's Sing and Dance for Comic Relief (BBC1, 6.55pm)

After three weeks of enthusiastic mimicry, the comedy-themed musical talent show draws to a close. Mel Giedroyc and Sue Perkins are on hand to present a live grand final, in which the six most popular celebrity performers from the previous three rounds battle it out. Back on March 4, first-round judges Katharine Ryan, Jo Brand and Frank Skinner were suitably impressed by Sara Pascoe's acrobatic turn as Chandelier singer Sia, while the public were wowed by Rickie Haywood and Melvin Odoom's 1990s-era Will Smith medley. These two acts became the first to grab a confirmed place in the final, and tonight, they perform alongside their rivals from successive weeks to determine which off-beat performance will ultimately be named the winner. Taking a seat on the panel this week are Rufus Hound, Katy Brand and Jason Manford, while Zara Larsson and Dua Lipa perform.

Ant & Dec's Saturday Night Takeaway (ITV, 7pm)

As they lay more groundwork for another NTA gong next year, the lovable Geordies welcome back the Takeaway Photobooth. Also in this week's show, Emilia Fox takes a step closer to discovering the MaskFace's identity, and Ant v Dec takes a medieval twist as the pair try their hands at archery. After another audience member gets the chance to Win the Ads, Gary Barlow, Mark Owen and Howard Donald take to the stage for a special End of the Show Show. There's all that, plus Gogglebox veteran Scarlett Moffatt adding her unique spin to proceedings.

When Lynn Barber Met Phyllida Barlow (BBC2, 7.30pm)

Artist Phyllida Barlow first met journalist Lynn Barber years ago when they were both mothers in North London. Lynn raised five children on a part-time teacher's salary, and it is only now in her seventies that she is achieving international art stardom. Barlow has risen to fame over the years by creating massive sculptures that appear precarious. Three decades on from her last visit to Phyllida's house, Lynn returns to interview Britain's representative at the art exhibition Venice Biennale 2017.

The Voice UK (ITV, 8.30pm)

The sought-after contract with Polydor Records becomes ever more tangible a goal as the eight remaining would-be pop icons enter the semi-final. Having survived auditions, the battle rounds, the knockout stage and the quarter-finals, the contestants should be more than a little familiar with the pressures of a live performance. However, with a place in the grand final in the offing, the pressure has never been higher for the singers. As always, coaches Will.i.am, Tom Jones, Gavin Rossdale and Jennifer Hudson are on hand to deliver their verdicts on each performer's voice-work, and ultimately cut the number of hopeful stars by half, as only four competitors can progress through to the final.

Paula Rego: Secrets and Stories (BBC2, 9pm)

Now 82, Paula Rego is one of Britain's foremost artists. She was born in Portugal in 1935, but has been settled in the UK for decades, having attended finishing school here before studying at the Slade School of Fine Art; but it was becoming a part of the London Group, alongside David Hockney and Frank Auerbach, that helped to establish her career in the 1960s. This documentary, directed by her son, Nick Willing, offers a unique insight into her life and work. Rego is notoriously private, and opens up on film for the first time here. There's also an opportunity to see clips from an archive of home movies and interviews spanning 60 years, as well as a chance to view examples of her extraordinary work.

All Round to Mrs Brown's (BBC1, 9.15pm)

Oh mammy! Brendan O'Carroll's famous creation is back on the box, but rather than offering us further insights into her family life, she's throwing open the doors to her home and inviting in celebrity guests while playing tricks on the audience and introducing outrageous stunts. Think of a more near-the-knuckle, adults-only version of Saturday Night Takeaway, and you're getting close to the idea. "The entire cast is excited by this," says O'Carroll. "I think Agnes may be worried that she'll need a bigger kettle to make tea for everyone that's coming round!" Those taking part in the first episode include actress Pamela Anderson, X Factor judge Louis Walsh and Andy's mum Judy Murray, while music comes from James Blunt.