Watch Long Lost Family Season 3 in Australia

Sue Udy has been searching for the daughter she was forced to give up for adoption over 40 years ago. Firefighter Alan Ross Harper is desperate to understand why his birth mother gave him up for adoption.

Growing up in Northern Ireland in the late 1970s, Wendy O'Hagan was seven before she learned about her real father. Her mother had fallen in love with American serviceman Grant Williams but Grant was suspected of being a Republican sympathiser and was eventually deported.

Davina McCall and Nicky Campbell present a series which aims to reunite family members after years of separation. David and Paul Shannon are searching for their father who disappeared from their lives when they were young boys. The family moved from Liverpool to South Africa in the early 1970s and returned a few years later when things did not work out.

Davina McCall and Nicky Campbell present a series which aims to reunite family members after years of separation. Despite a happy childhood and loving adoptive parents, long distance lorry driver Laurence Peat has been unable to shake off the feeling that he was unwanted.

Robert Capron is 53, a devoted family man who lives in Devon but whose life today contrasts starkly with the world in which he grew up. At the age of two, Robert's mother abandoned him and not until his father's death was Robert able to start piecing together what little information he could find about her.

Fifty-year-old Sharon Temple Sowerby grew up caught in a tug of love between two mothers. When she was a girl, Sharon discovered that the mother she knew of as 'mam' was not in fact her birth mother. Over the years, as the truth gradually emerged, Sharon discovered that she had been taken from her birth mother at only one hour old and given to a couple desperate for a child, who brought her up as their own. But Sharon also discovered that legally she was never theirs. Sharon's birth mother had refused to ever sign adoption papers and on several occasions actually asked for Sharon back. This tug of love continued until Sharon moved away to Germany with her parents. Heartbroken by these discoveries, Sharon has been searching for her birth mother for nearly thirty years but without success. Watch what happens when we take on this seemingly impossible search and meet the man searching for the same woman, who is also his birth mother.

Davina McCall and Nicky Campbell present the series which sets out to reunite family members after years of separation. Fifty one-year-old Londoner Chris Jones is searching for his sister who he last saw when she was a baby and Polly Gillon is searching for her eldest son who she was forced to give up for adoption in 1959.

Davina McCall and Nicky Campbell present the series which sets out to reunite family members after years of separation. Fifty one-year-old Londoner Chris Jones is searching for his sister who he last saw when she was a baby. Chris has little knowledge about his mother's past, but knows that his sister was born in a remote Northumberland vicarage, and that is where he starts looking for clues. Polly Gillon is searching for her eldest son who she was forced to give up for adoption in 1959. Polly grew up with her father in South London in the 1950s and when he discovered she was pregnant, he forced her to make a heart-breaking decision. She was given the choice: give her baby up for adoption or never come home. With no one else to turn to, Polly finally accepted her father's terms and gave her baby up. She has spent a lifetime regretting this decision and is desperate to ask her son to forgive her.

Davina McCall and Nicky Campbell uncover more family secrets. Val Milnes became pregnant at 18, and knowing that her strict father would never allow her to keep the child, she made the heartbreaking decision to give him up for adoption. She watched as he was taken away by his new parents with the case of clothes she had carefully prepared. Seventeen years later, Val suffered an accident which left her paralysed and tried to establish contact with her son, sending him a series of letters. The fact that these letters went unanswered has haunted her ever since. In the second of tonight's stories, Donna Leaver told her father Pat in a telephone call that she did not want him in her life any more when she was 6 years old. Taking her word for it, Pat disappeared and made no further attempt to contact her.