The Three Day Nanny (Channel 4, 8pm)

KATHRYN Mewes has more than 20 years’ experience working with children… and their parents. She was trained at the prestigious Norland Nanny School and has since set up her own nanny practice where she has worked intensively with hundreds of families to give them bespoke troubleshooting advice.

The Three Day Nanny sees Kathryn arriving at their homes to restore order and bring the families back together, using her unique three-day action plan and her extensive knowledge acquired over the past 20 years.

In this new series, Kathryn is faced with some of her toughest challenges yet: a stay-at-home dad struggling with two boys aged two and three who won’t stop fighting, while their mum struggles to spend more than ten minutes alone with them. Then there's a single mum of four under the age of three trying to control her children and get out of the house with them, coupled with the constant demands to be carried; three children whose relentless fighting, biting and name calling are tearing the family apart; tantrums that can last a full day; the extreme attention seeking two year old who is constantly banging his head in protest and trying to get his parents to react and fighting brothers at war with mum and dad who admit they are clueless at how to cope. The pressure then mounts as Kathryn withdraws to observe how and if the parents have put her advice into action and whether they can cope without her by their side. But whatever problems Kathryn is faced with, her solutions might be seen as unconventional by some but they are always effective.

Jamie Isaacs, executive producer says: "We are delighted that Channel 4 have asked for this third series. The programmes have a powerful message about how to be a parent today. Kathryn is pretty unique and she never fails to impress."

Tonight we meet the Scott family. Bobbie and Freddie are three and two, but have developed the habit of pinching, biting and punching anyone and everyone. Parents Chris and Becky don't seem to have any control over the situation. Kathryn is ready with a few strict rules and a plan for this struggling Northamptonshire family.

Saving Lives at Sea (BBC1, 9pm)

IN Cornwall, the station's newest recruit, 18-year-old Shaunna, is following in the family tradition and her grandfather's footsteps. After a successful first rescue of a teenage holiday maker, she hopes to become Newquay's first helmswoman. Meanwhile, on the West Coast of Scotland, the remote fishing village of Oban also has a new 18-year-old recruit, Andrew. However, he and the rest of the crew are given a painful reminder of the dangers all lifeboat volunteers face when they are woken in the middle of the night to rescue a fishing boat that is sinking.

Long Lost Family (ITV, 9pm)

FIFTY-year-old Deborah Ozturk has spent years longing to find her birth mother and thank her for the sacrifice she made when she gave her up as a baby. Meanwhile, 74-year-old Ray Jones from West Sussex realised as an adult that there was a void in his life, after he was separated from his mother and younger brother at the age of two. However, during his search for his family the previous year, he accessed his case file and is now haunted by a missed opportunity. Presented by Davina McCall and Nicky Campbell.

Selling Houses with Amanda Lamb (More4, 9pm)

THE property guru returns for a new series in which she lets home sellers check out their rival vendors' properties for inspiration. Episode one comes from Cardiff where Ms Lamb arrives with design ideas and £1,000. However, the homeowners only have seven days to make the changes to their homes to impress buyers Harriet and Beth. While Colin and Sharon try to transform their cluttered kitchen-diner into something more cosy, Christine updates her deep purple dining room, and Nikki hopes to spruce up her tired detached home with the assistance of her friend, Caroline.

Viv Hardwick