What Would Be Your Miracle? (ITV, 9pm)

JUST weeks before the birth of her third child with Busted singer Matt Willis, 40-year-old Emma Willis reflects on her two-year project to move away from The Voice and Big Brother to host a series that moves into the territory of Long Lost Family and Surprise Surprise.

What Would Be Your Miracle? follows the stories of people who are desperate to overcome severe disability, or want to be able to see, hear or walk for the first time.

"I'm so proud of it. It's so emotional, and although it;s devastating at times, it's also really heart-warming and feelgood TV," Willis told TV Times.

She says she begged and pleaded to take the helm of this series. "I'd wanted to do a documentary for a while, and when this came along, it made total sense for me. My mum has worked for the NHS for 40 years, and when I was growing up, all I wanted was to be a nurse like her."

Filmed over the course of two years, it follows the stories of people who are hoping that their lives will be transformed by the power of modern medicine. In each of the three episodes, Willis will meet two people who are undergoing operations plus months of rehabilitation before they can discover if the procedure has had the life-changing effect they and their families were hoping for.

During the opening episode, she goes to Aberdare, South Wales, to meet nine-year-old Garin Morgan, his parents Ashley and Adele, and big sister Emily. At the age of two, Garin was diagnosed with cerebral palsy, and his family were told that meant he would never walk. Understandably, the news hit his parents hard, and to add to the pressure, in the same week that Garin received his diagnosis, Adele fell ill and was told she had multiple sclerosis.

Now, thanks to surgery pioneered in America, there's a possibility that Garin may be able to leave his wheelchair behind. Following an operation at Bristol Royal Hospital for Children, Garin prepares to walk unaided for the first time – and a year later, Willis arrives to make another one of his dreams come true with a surprise visit to Cardiff City Stadium.

The episode also introduces us to 55-year-old Andrea, who was diagnosed as partially deaf as a child. She learned to lip-read, but then found she has Usher Syndrome, and is also going blind.

A cochlear implant could allow her to hear. When the implant is switched on, Andrea's brain is initially unable to make sense of the sounds it is being sent. Time for the tissues as we learn that this is another miracle in the making.

Kirstie and Phil's Love It or List It (C4, 8pm)

NEW series. The return of the head-to-head property show in which Phil Spencer tries to persuade fed-up homeowners to sell, while Kirstie Allsopp argues for extending or redesigning. Matt and Lucia's house in Royal Wootton Bassett, Wiltshire, is bulging at the seams, as it is home to not only them but three grown-up children from previous relationships. Matt loves it but Lucia does not, so while Kirstie tries to change the layout, Phil finds some alternative properties. But will the family choose to up sticks or stay where they are?

Line of Duty (BBC2, 9pm)

THE third series of Jed Mercurio's police procedural began with a big twist when Daniel Mays' bad guy was killed off at the end of episode one. After four equally gripping episodes which delved further into the corruption scandal hinted at in series one and two – and reintroduced Keeley Hawes as anti-hero Lindsay Denton – it seems the feature-length finale promises to up the ante as one of the AC-12 officers finds themselves on the other side of the interview table on suspicion of murder. An undercover investigation may provide the key – but will the unit ever uncover the truth about "the Caddy"? Martin Compston, Vicky McClure, Adrian Dunbar and Polly Walker star. Last in the series.

Viv Hardwick