Love Your Garden (ITV, 8pm)

Betty Hicks is an amazing lady. Now 90 years young, the fearless lifelong volunteer and fundraiser, who lives in Fareham near Southampton, has raised thousands of pounds over the years and helped increase awareness for a number of causes, both locally and nationally.

Betty's last epic adventure saw her abseil down Portsmouth Harbour's Spinnaker Tower in 2016.

The structure, which represents sails billowing in the wind, is two and a half times as high as Nelson's Column, and can be seen from the Isle of Wight, the Manhood Peninsula and Highdown Gardens in Worthing. It is one of the tallest accessible structures in the UK outside London.

So what made Betty want to complete this feat of derring do and make her way to the top and then to the bottom of the 170-metre-tall structure?

Like many other elderly people, Betty suffers from macular degeneration (also known as age-related macular degeneration, AMD or ARMD) - a gradual loss of sight.

This common condition leads to a deterioration in the middle part of a person's vision and usually first affects people in their 50s and 60s.

Although it doesn't cause total blindness, it can make everyday activities like reading and recognising faces difficult.

Betty is understandably passionate about this, and chose to abseil down the giant structure on the south coast to raise funds and awareness of the condition.

Despite her youthful get-up-and-go attitude, Betty's garden in Fareham is actually a green-free concrete box, and there are so many levels and trip hazards, that it's currently off limits to the sight-impaired nonagenarian daredevil.

So in step Alan Titchmarsh and his team of experts, Yorkshire designer Katie Rushworth, Kent horticulturalist Frances Tophill and This Morning's resident gardening expert David Domoney.

They are returning with a new series of the popular gardening programme, as they share more inspirational ideas and green-fingered tips, while transforming the backyards of some of the nation's most deserving people.

The team sets about rejuvenating Betty's garden and turning it into a safe, and sensory haven for her.

Inspired by Betty's love of vivid colour - which her failing sight can still appreciate - the team creates an elegant formal garden that's brimming with the brightest of shades.

Alan shares some topiary tricks of the trade, and along with the other experts, they eventually astound Betty with the radical garden transformation.

However, along the way, it's brave Betty who leaves the team speechless.

She regales them with remarkable tales from a lifetime of feats and fundraising and explains why she is still putting others first, even at the grand old age of 90.

Despite Alan and the experts good deed in her garden, viewers will be left in no doubt as to who the real hero is.

999: What's Your Emergency? (C4, 9pm)

The UK's National Health Service turned 70 earlier this month, and to celebrate there have been a whole host of programmes looking at the work of the people who we rely on to save our lives.

More of us than ever before are dialling 999, asking the emergency services to pick up the pieces when something goes wrong.

And tonight sees the return of the documentary series that takes intimate and frank look at modern Britain through the eyes of those on the front line.

As in the previous series, the focus is on Wiltshire's paramedics, as well as police and fire services, and one of the first cases covered is a man with an axe-related injury.

Meanwhile, another team responds to a call-out to help the victim of a rugby injury, and at a road traffic incident, a woman with life-changing multiple injuries has to be cut out of her car.

Our Girl (BBC1, 9pm)

In case there was any doubt that Michelle Keegan is far more than just a pretty face, this compelling series has underlined the fact.

In the last episode, Georgie is caught in the crossfire when another attempt is made on Inspector Chowdhrey's life, forcing her to re-examine her feelings for her Captain.

With Chowdhrey's son Sumon still missing, Georgie persuades James to call in Special Forces.

A daring mission is conceived, but two section find themselves in a deadly shoot out with the drug gang to recover Sumon and halt the Yaba trade.

Long Lost Family (ITV, 9pm)

Davina McCall and Nicky Campbell investigate the case of Maria Roberts, the daughter of Italian parents who had a happy adoption growing up with an English family, and now hopes to find Gilda, her birth mother.

The team also meets Francesca Barnes, who is in the early stages of transitioning from male to female.

She was born with the name Paul and given up for adoption as a baby.

Francesca is now searching for her mother, Norma, but fears her transition may prove too much of a challenge, and lead to rejection.