Twiggy sets off to investigate her mom's family; she discovers how tough times were in Victorian London and that her relatives didn't always stay on the straight and narrow.
Scottish comedian and actor Billy Connolly traces his ancestral connections back to a pivotal point in Indian history.
Reggie Yates sets out on the trail of his grandfather, Harry Philip Yates; his journey takes him to Ghana, where he unravels a complex family history where Ghanaian culture and British colonialism collide.
From a shotgun wedding to the Birmingham Blitz, Martin Shaw tries to sort fact from family fiction and discover the grandfather he never knew.
Mary Berry sets off on a journey to find out about her father's family; along the way she discovers illegitimacy, bankruptcy and, even more surprising, a baker.
Sheridan Smith traces her ancestry back to her great-great-grandfather, musical impresario and banjoist Benjamin Doubleday.
Brendan O'Carroll turns detective as he attempts to track down the men who murdered his grandfather at the height of the Irish War of Independence.
Tamzin Outhwaite's journey into her Italian past uncovers the rags-to-riches tale of her great-grandfather Adelmo and takes her on an unexpected trip to a prisoner of war camp.
Brian Blessed uncovers the story of his great-great-grandfather Jabez Blessed, a tale of hardship, struggle and survival worthy of "Oliver Twist."
Actress and national treasure Julie Walters follows her roots back to rural Ireland; the journey reveals a tale of poverty and tyranny and, ultimately, triumph at a tumultuous time in Irish history.
Veteran BBC news reporter and World Affairs Editor John Simpson follows the trail of his adventurous great-grandmother and her life with Samuel F. Cody, the cowboy turned aviator; he also makes a shocking discovery about the husband she left behind.
Marianne Faithfull investigates her mother's early life as a dancer in 1920s Berlin, the era immortalized in the film "Cabaret", and investigates whether there is any truth to the rumor that the family was involved with the Austrian Resistance.
Comedian Sarah Millican follows the trail of her four times great-grandfather, John Malcolm, to Canada, where he worked for the Hudson's Bay Company; as Sarah follows in his footsteps, she makes a truly shocking discovery.
Actor Nitin Ganatra moved to England from Kenya when he was a 3-year-old and has questions about his identity; he wants to investigate why his family left Kenya and why it immigrated to Africa from India in the first place.
Nick Hewer is intrigued about how his maternal Catholic grandfather reached the office of high sheriff in Protestant-dominated 1920s Belfast; on his father's side, he discovers how his family's fortunes were shaped by the English Civil War.
Presenter and former footballer Gary Lineker follows the trail of his great-great-great-grandfather and discovers that he was a poacher in Victorian England and served time in Leicester Prison; Gary wants to know why he was a repeat offender.
Actress Lesley Sharp was adopted; she traced her birth mother and discovered that she was the result of her mother's affair with a married man; knowing that her biological father has passed away, Lesley is ready to find out more about him.
Actor Nigel Havers travels to rural Cornwall to discover a tale of illegitimacy worthy of a period drama; on his father's side, Nigel finds himself in Colchester unraveling a story of someone who made good, then ends up losing everything.
Actress Una Stubbs never met her paternal grandparents; Una, who was the face of Rowntree's Dairy Box in the 1950s, is amazed to discover that her grandfather worked for the chocolate manufacturer 30 years before.
John Bishop is surprised to discover that he's not the only person in his family to have made extraordinary career choices; he is astonished when he finds out what his great-great-grandfather, Charles Bishop, ended up doing.
Athlete and pundit John Barnes investigates the role his grandfather played in Jamaica's struggle for self-rule; John discovers how his grandfather became the subject of secret telegrams and why he was interned by the British during World War II.
Actress Celia Imrie comes from a long line of aristocrats on her mother's side, but has always resisted finding out more about her illustrious heritage; she feared they'd turn out to be privileged and boring, but she is quickly proved very wrong.
Actor William Roache's grandmother, Zillah Waddicor, ran a café in Alton Towers in the 1920s and 1930s, before it became a theme park; Bill remembers her as a kindly lady and is astonished to find that the café was an ambitious enterprise.
Actress Alex Kingston's great-grandfather died during World War I, leaving behind a wife and young family; she sets out to investigate exactly what happened to him and discovers how his pre-war career as a photographer put him in an unusual position.
Comedian and actor Hugh Dennis's grandfathers both fought in WWI, but rarely spoke about what they went through; Hugh uncovers their very different wartime experiences.
Annie Lennox investigates her late grandmother's side of the family and uncovers a tale of illegitimacy and poverty; she discovers the humiliation her unmarried great-great-grandmother suffered before the Scottish church.
Patrick Stewart investigates his father's extraordinary war career and discovers the shocking impact it had on his father's character.
Gregg Wallace wants to solve the mystery of what happened to his great-grandfather, Henry Roland Springett, who abandoned his family and was thought to have deserted the Navy; Gregg follows the clues that enable him to piece together Henry's life.
Actress Samantha Womack's parents separated when she was young and she grew up with only a fractured sense of her family history; she starts her journey by looking into the military career of her great-grandfather, Alexander Cunningham Ryan.
Artist Tracey Emin's work explores love, loss and sexuality and draws deeply on her past; she wants to look back and explore her lineage; she knows very little of her maternal line and is keen to find out more about her East End roots.
Ballroom dancer Len Goodman feels it is time to find out about his ancestors; he spent much of his childhood with his mother's parents in Bethnal Green and it is this side of the family that Len wants to investigate.
Former television presenter Richard Madeley decides to find out more about his family roots and in particular, the Canadian side of his family; he traces his extraordinary lineage back to the earliest Canadian and, to his surprise, American pioneers.
The Bee Gees' Robin Gibb discovers a tale of poverty and grit as he finds out how his paternal great-grandfather became a decorated soldier; on his mother's side, he wants to find out more about his great-grandmother, who was a midwife.
Alan Carr explores his family's connection to soccer and his grandfather's brief brush with fame; he investigates a mysterious name change and finally discovers the shocking truth, exposing a previously hidden chapter of social history.
Actress Emilia Fox sets out to learn just how far back her family's acting roots go; uncovering a rags-to-riches tale, Emilia discovers that her great-great-grandfather, Samson Fox, made one of the most important inventions of the 19th century.
Actor Larry Lamb's mother was adopted as a baby and he's keen to discover more about this unknown side of his family; Larry especially wants to find out about his biological grandparents, a detective hunt that takes him across the world to America.
Olympic gold medal winner Sebastian Coe sets out to discover if there is any truth to his grandmother's claims that the family's origins were quite grand; it turns out granny was right, although perhaps not quite in the way she thought.
National treasure June Brown is the oldest person ever to take part in the show; during her search to find out if she is a real `EastEnder', June unravels her Jewish heritage and discovers how momentous historical events shaped her family's destiny.
Australian Jason Donovan is a successful singer and a star of West End musicals; starting in his hometown of Melbourne, he meets his mother's cousin and discovers that the show business roots in his family go deeper than he suspected.
Alexander Armstrong traces his lineage where he learns that he comes from a very privileged background.
Rupert Penry-Jones traces his family tree; his mother, Angela Thorne, was born in Karachi when it was part of British India; there's a story of Indian blood in the family, so Rupert heads to Allahabad Fort in India.
Gardener Monty Don's investigative efforts lead him to a port near Anglesey, where he learns of a national disaster that ended in a family tragedy; Monty has heard his ancestors were part of the Keiller marmalade dynasty in Dundee.
Irish actress Dervla Kirwan traces her family tree and discovers that her great-uncle was Michael Collins, a national figure who changed Irish history and fought to establish the Irish Free State.
Actor Rupert Everett investigates the paternal side of his family; he visits his mother, Sara, to find out more about his father's early life; he discovers that his paternal grandfather worked in Nigeria for the Colonial Service.
Bruce Forsyth receives a letter from a woman in America who claims to be related to Bruce; the letter suggests that his great-grandfather was married to two women at the same time; Bruce determines to investigate these claims and discover the truth.
Martin Freeman's father died when he was just 10-years-old; his parents had divorced some years before and Martin knows virtually nothing about the paternal side of his family history; now he wants to fill in the blanks.
In Scotland, comedian David Mitchell knows his family was wealthy sheep farmers in Sutherland, but mysteriously gave up the lease to the farm in 1933; he wants to find out why; he also discovers how one member of the family became a local hero.
Presenter Kate Humble's paternal grandfather was a test pilot and she believes her maternal grandfather ended up in Colditz; at the National Archives, she discovers her maternal grandfather Stanley Carter's POW liberation report.
Radio 1 DJ Chris Moyles finds himself unexpectedly emotional as he goes back to his Irish roots; in Dublin, Chris is surprised to discover that his maternal grandmother, Hannah Nelson, grew up in the care of her grandmother from the age of three.
Davina McCall makes some intriguing discoveries about her family's past; Davina is half-French, but knows very little about her maternal French heritage; she also wants to know if the English side of her family is descended from royal blood.
Chef Rick Stein explores his family's troubled past; he sets out to uncover his father's life, from the abuse he suffered as a child during World War I due to his German ancestry, to his suicide in the 1960s.
Fiona Bruce's great-grandfather Frederick Crouch died in World War One in mysterious circumstances; the family has their own version of what happened while Frederick's widow tells a different story.
Model and presenter Jodie Kidd investigates her great-grandfathers, both of whom were awarded titles; her father's grandfather was Lord Beaverbrook, a newspaper magnate; her mother's grandfather was Sir Rowland Hodge, a Newcastle shipbuilder.
David Suchet explores the English branch of his family, which leads to the National Maritime Museum and a story of a shipwreck, tragedy and heroism; he journeys across Eastern Europe in search of the roots of his unusual surname.
Ainsley Harriott heads to the West Indies to uncover his roots; on arrival in Jamaica, Ainsley thinks he knows his father's family history, but there are many surprises in store.
Esther Rantzen investigates the story of a `black sheep' of the family, her great-grandfather; following some financial trouble, he abandoned his family and fled to America; Esther uncovers a scandalous story of fraud, bigamy and murder.
Jerry Springer undertakes a painful investigation into the fate of his grandmothers, who both died during the Holocaust; Nazi documents reveal their fate in shocking detail and Jerry traces the journeys they took.
Boris Johnson sets out on a journey to find out more about his roots in Turkey and follows an intriguing family trail that leads him to a surprising conclusion.
Patsy Kensit's late father was a villain, involved with London's notorious gangsters of the 1960s, the Krays and the Richardsons; she seeks to understand the roots of her dad's criminality.
Newsreader Natasha Kaplinsky travels to Cape Town to explore her parents' exile from South Africa in the 1960s and learns about the vital role her father played in the anti-apartheid demonstrations; she explores her Jewish heritage in Belarus.
David Tennant finds that his Scottish grandfather, Archie McLeod, was a footballer who played in Derry, where he met and married David's Irish grandmother; her family story is played out against a backdrop of sectarianism.
Athlete Colin Jackson was born in Wales, to Jamaican parents; he travels to Jamaica to research his family history and is very surprised to learn from his DNA that he is seven percent Native American; this reveals a link to the Maroons.
Barbara Windsor traces her maternal grandfather to the east London docks and finds that his mother was a matchgirl at the Bryant and May factory; she discovers that her mother's ancestors were Irish and that she's related to the artist Constable.
Director Gurinder Chadha grew up in West London, but was born in Kenya; she traces her ancestors' history, from her father's life in colonial Kenya to her grandmother's experiences during the partition of India; she tries to uncover a family secret.
Comic Jim Moir examines the class structure of 19th-century England and domestic service.
Meera Syal wants to find out why she has a rebellious streak, and it's a quest that leads back to her grandfather's contribution to the struggle for Indian independence; Meera finds clues as to how her family history is linked to the fall of the Raj.
Opera singer Lesley Garrett's lineage reveals the history of northern England's working class.
Comic David Baddiel examines his mother's theory that she was adopted so she could escape Nazi Germany.
Moira Stuart comes from a family of high achievers, who have been traveling since the end of the 19th century; her journey takes her to the Caribbean as she confronts the legacy of slavery in her own family's history.
Ian Hislop travels to Scotland, France and South Africa while researching the lives of the grandfathers he never knew; he learns about their roles in World War I and the Boer Wars.
The family history of author Jeremy Clarkson charts British manufacturing from the mid-19th to the mid-20th century.
Sue Johnston sets out to find out more about the grandfather she idolized as a young girl and who she believes piloted the Flying Scotsman.
Actress Amanda Redman explores how Victorian family values affected her grandfather and uncle.
Bill Oddie embarks on a very personal journey to try to find out what happened to his mother, who was institutionalized for most of his childhood; it takes him back into the history of mental health in the postwar years.