Alan Titchmarsh returns with a new series of the hit gardening show. He comes to the rescue of a fellow gardener and his family in Hurst Green as they bravely cope with a life-threatening illness. Diagnosed two years ago with motor neurone disease, Malcolm Dean is confined to a wheelchair and unable to go outside and do the gardening he used to love. He, his wife Trish and nine-year-old son George have recently moved into a specially adapted bungalow a few doors down from their old home. But the sloping garden makes it virtually impossible for Malcolm to get much beyond the end of the ramp which his friends and family bought and installed. Alan turns up to surprise the family and to see for himself how unsuitable the current garden is for their needs. He then sends them away whilst his crack team of landscapers and horticulturalists arrive on site, hoping to build a garden that exceeds the family's expectations.

Today, Alan Titchmarsh is in Cambridge to help transform the garden of a mother whose son requires round the clock care. Suzi's son Isaac is confined to his bed or wheelchair and unsurprisingly she has been unable to spend any time on the garden which has become neglected. A huge space, Alan has an idea to bring some sun to the place and visits a garden in Chelmsford where the owner has recreated a Caribbean beach. Back in Cambridge, David Domoney sets to work to create a path which will give Isaac access to all parts of the garden. Frances Tophill fills the surrounding gravel beds with Mediterranean plants. Then, to round things off a state of the art sound system is installed along with an outdoor pizza oven and a sail shade.

Alan Titchmarsh and his team come to the aid of Carol Nwosu, who has to care for her son Danny - who has sickle cell anaemia - while coping with her own crippling arthritis. In spite of this, Carol dedicates her time to running a charity that supports families whose children have sickle cell disease. Understandably, the garden at their Morden home has been neglected. Alan surprises Carol on her doorstep and packs the family off for a few days while his team of contractors get to work. Alan's plan is to make the garden seem larger by laying it out on the diagonal and to use level changes and straight lines to emphasise more space. Landscaping expert David Domoney lays a new patio across the garden, leading down to a sunken seating area. Alan wants to replace the old garage with a sanctuary for the kids, but first permission must be obtained from the headmistress of the adjacent school. As the family return, the garden has been transformed - but will it meet all of their requirements?

Alan Titchmarsh and his team come to the rescue of people who need their help in making the most of their outdoor spaces. This week they are in Gloucestershire at the home of Kathy Mason, a remarkable mother of two who has devoted her life to looking after others. For the past 18 years she has cared for her brother, who is in a wheelchair. She also nursed her mother and her husband, who both died of cancer within three years of each other, and she has fostered and adopted children with learning difficulties. With so much on her plate it is no wonder that her garden has been neglected. Alan and the team get to work, and with several existing trees as his inspiration, he sets about creating a magical woodland, while David Domoney, Katie Rushworth and Frances Tophill have their work cut out. The key feature is going to be a summer house, where Kathy can relax, but laying the lawn over the quagmire left by the torrential rain proves a problem.

This week, Alan Titchmarsh and his team come to the aid of a Falklands veteran and his wife who need help turning their barren back garden into a planting paradise. Having joined the army aged 15, John Phillips went on to become a bomb disposal expert with the Royal Engineers. Sent to the Falklands in 1982, John was defusing a device onboard HMS Antelope when it exploded, costing John's colleague his life, while he had to have his arm amputated. John was awarded the Distinguished Service Cross and continued to serve for another 30 years. Now retired, he and his wife have moved to a bungalow in Woking to be near one of their children, but the task of overhauling their desolate garden is beyond them. With the help of David Domoney, Katie Rushworth and Frances Tophill, Alan delivers some colour, a new greenhouse and a seating area in a cosy corner from where the couple can see the garden's new focal point - a piece of Falkland rock donated and delivered by the Royal Engineers.

Alan Titchmarsh and his team of helpers transform a bare and unwelcoming outdoor space into a wildlife-filled paradise. Rhyanne Nixon has motor neurone disease and is confined to a wheelchair. A bubbly and outgoing lady, she and her family have moved to a small bungalow, whose garden is dominated by a large wooden viewing platform - which she cannot access. Rhyanne loves wildlife and as a former holistic practitioner would enjoy a garden filled with colour and scents. As the team get to work, Alan envisages a wildlife-friendly environment centred around a large new pond, and filling it with water is David Domoney's first challenge. Katie Rushworth and Frances Tophill are looking after the planting as they create borders filled with Rhyanne's favourite flowers and smells. On her return, will the garden be everything she hoped for?