The cameras follow Shaine from Bournemouth. He is a prolific amateur poet who suffers with a learning disability and desperate to find love. Carolyne is a bubbly 29-year-old from Greater Manchester who is fed up with always meeting the wrong guy. She woke up five years ago after going to bed paralysed from the chest down after a weak blood vessel burst in her spinal cord. The cameras follow her after she meets a man called Wayne.

The cameras follow media student Sam from Kent who is suffering with Down's Syndrome. The 27-year-old has appeared in the television shows The Inbetweeners and EastEnders and has a supportive family life, but wants to find a girlfriend. The cameras also follow Kali, a 20-year-old singer from south London, has William's Syndrome who is desperate to find love.

Twenty-six-year-old Michael is determined to find someone to love, but is struggling to hold down a relationship. Despite having had 17 girlfriends in the past, some of whom lasted only a few days, his autism means that even holding a conversation with a girl can be a huge challenge. He goes to a speed-dating evening and then, after a pep talk from his mum, he pulls out all the stops on a blind date with Helen. Twenty-one-year-old Brent, from Plymouth, has been single for nearly a year since coming out of a long-term relationship. Meeting girls can be hard when he doesn't know what might come out of his mouth on a date. Brent's Tourette's syndrome includes shouting, swearing and involuntary movements, but dating can help with his condition. He goes on a date with Lizzie and they then go snow-boarding. Sarah from Hertfordshire was 18 when she suffered a stroke during an English lesson.

Extreme sports enthusiast 34-year-old Samantha has it all - amazing friends, a beautiful home, and even a PhD in psychology. The only thing eluding her is love. Attractive, articulate and bright, Sam should be fending off suitors, but Sam has achondroplasia, the most common type of dwarfism, and being 3 foot 10 tends to attract all the wrong kind of attention. She's looking for someone as gutsy as she is - will James from New Zealand rise to the challenge, or is rocker Colin more her type? Ray is 49; an office-worker who has a learning disability, Ray's heart was broken three years ago when his fiancee Lolita left him. He's decided it's time to meet someone new, even though moving on means finding love through the dating agency that Lolita runs. But Lolita is feeling emotional about Ray's return to the dating game and thinks she might want him back. Thirty-year-old Steve is worried that his facial disfigurement - Crouzon Syndrome - may put off potential girlfriends.

This time the Undateables include Kate, an incurable romantic, and Damian, whose dream date is a moonlit picnic in the park. Amateur poet Kate is 29-years-old and has Down's Syndrome. When not working, Kate writes verse or watches rom coms. She dreams of finding her perfect man and future husband. Having been single for nine years, Kate decides that it's time to turn to dating agency Stars in the Sky for help. The agency sets her up on a blind date with 32-year-old year old Simon, and they visit a maze in Ross-on-Wye. The date goes well, and they arrange to meet for a second time. Damian has albinism and must spend much of his time indoors. He has been single for four years. Oliver is an artist who paints romantic scenes of his own imaginary love life. Diagnosed with autism when he was two years old, he often finds social situations difficult. When Oliver meets Amy at a disco, they decide to go on a date together and he ends up plucking up the courage to ask her to be his girlfriend.

Heather has severe OCD. Gareth has brittle bones and has broken his legs over 150 times. Matthew has autism. Can the three of them find partners? Thirty-eight-year-old Heather's OCD means she cannot have any physical contact due to her fear of contamination by people's germs and hasn't invited anyone into her home for years. Heather also has Asperger's, making things such as eye-contact very hard for her. Heather goes on her first date in three years, with Peter. Twenty-eight-year-old Gareth has osteogenesis imperfecta (OI) which makes his bones extremely brittle. He has broken his legs more than 150 times in his life, and uses a wheelchair. 'I just don't want to die a 40-year-old virgin', he says. Gareth takes Beth on a date to a seafront restaurant, but will they hit it off? Matthew is 20 years old and is a student at a college in Milton Keynes. He is keen on karate and indie music. Despite a busy and fulfilling life, Matthew has autism and has never had a girlfriend

This episode revisits Richard, an amateur radio enthusiast with Asperger's, and comedian Luke, who has Tourette's. There's also 32-year-old Shaine from Bournemouth, a prolific amateur poet with a learning disability who's written over 3000 love poems, some for complete strangers. Sam, from Kent, is a media student and actor with Down's syndrome who's appeared in The Inbetweeners and EastEnders. Last year, having never been on a date before, Sam fell in love with 28-year-old Jolene and, seven months on, the romance is still going strong

Student James is funny, ambitious and excels at his studies, but when it comes to finding love he has never had much luck. James has Asperger's and believes his problem is that he talks too much. Will his date with 24-year-old Chloe lead to romance?

Football and EastEnders fan James from Essex, who has a learning disability, has not had a girlfriend in over ten years. Lucas from Leicester is a daredevil when it comes to sports, but not so much with meeting girls.

23-year-old footballer George had a near fatal car accident that left him paralysed from the chest down. George now wants a girlfriend, but since his accident he's been too nervous to ask anyone out. Will his charm win the heart of Nathalie?

A catch-up with contributors featured in previous series as they continue their quest to find love. Featuring Ruth, who has Tourette's and dates budding comedienne Nathalie.

A year ago, Steve, who has Crouzon Syndrome, proposed to Vicky. Now, their wedding is only weeks away and Steve has to overcome his fear of being seen in order to face 150 people.

Richard, who is 42 and autistic, has been on several first dates but has never managed to get a second. He pushes himself out of his five-mile comfort zone to meet Lucy, who's 45.

Trainee accountant and Bollywood fan Nisar has a stammer, which he believes has got in the way of dating. Now, however, he feels the time is right to face his fear of talking to girls and find his leading lady.

Three singletons with challenging conditions look for love. Airplane buff Jason, who has Asperger's syndrome, joins rugby player Tom and proud sports car owner Alex as they each pursue romance.

A catch up with some familiar faces, including Leeds fan Ray, photographer Becky, James, who's back dating, and poet Shaine, who marks two years with his girlfriend on a special trip to London.

Featuring Japan aficionado Francesco, who has never been on a date, 54-year-old Feron, and Alex, who dresses loudly to stand out from the crowd. All are hoping they will find romance.

A festive show featuring much loved familiar faces sharing their special plans for the most wonderful time of the year, including rock singer Dan, and massive Leeds fan Ray from London

Charlotte's looking for her life partner, Richard is desperate to find Mrs Right, Alex is back to find that special someone, and Sam is happier than ever now that he's engaged.

Some familiar faces from The Undateables explain what the series has taught them about love

A guide to navigating the tricky world of dating from some of The Undateables

The first episode features Richard, an amateur radio enthusiast, who has Asperger's. Richard will only date a woman who lives within a five-mile radius, and won't eat on a date. Meanwhile, 23-year old Luke is a stand-up comedian who has Tourette's. He's got an active social life and a good group of friends, but in a world where first impressions are everything, he's petrified of approaching a girl for fear of calling her a slag - or worse. How will Luke cope when he meets Lucy, a part-time receptionist, who's never known anyone with Tourette's before? Trainee teacher Penny, 23, has a genetic disorder that means her bones are extremely brittle. She's never been on a date before, and is worried about getting left behind. Penny is three feet three inches tall. Her ideal man is a 6 foot tall policeman.

Rory has Asperger’s and hopes to meet a girl who shares his love of horror films. Roland wants a leading lady to serenade. And animal lover Molly seeks a soulmate.

Sam, who's never had a date, is looking for love, Jodie is looking for someone to explore the world with and Hannah, who plays ice hockey for Team GB, is looking for an action man.

Rory is determined to find love again, Lily is on a mission to find the one, Jordan takes his girlfriend away on a surprise weekend, and Nicholas is back for his second date.