Television personality and veterinarian Dr Chris Brown attempts to figure out a longstanding family mystery.

Singer Casey Donovan shot to fame at the tender age of 16 when she won 'Australian Idol'. But her sudden rise to stardom raised complicated questions about Casey's Aboriginal heritage.

Australia's favourite scientist Dr Karl Kruszelnicki, is a qualified medical doctor, engineer, and physicist whose media career began in 1981.

Perth born entertainer and performer Todd McKenney is keen to know where the McKenney name comes from and is on a quest to uncover traits passed down to him by his father’s forebears. On his maternal side, there is no doubt that Todd gets his dancing talent from his mother, Peta and his maternal grandmother. However, Todd is keen to discover an ancestor with a colourful past. Will Todd find what he’s looking for?

Natalie Imbruglia has always taken pride in her father’s Italian ancestry, but she knows very little regarding her mother’s Australian heritage. Although family folklore points to strong-willed and independent women on this side of the family, Natalie wants to know more about these women and their stories. This journey will allow Natalie to finally connect with her Australian ancestry dating all the way back to the beginnings of the colony.

Having always struggled to understand culturally who he is, renowned neurosurgeon Charlie Teo is looking for answers. Exploring his mother’s side of the family, Charlie’s journey will take him to Malacca, where he discovers a culture he’s never heard of, but one with which he can now clearly identify. On his father’s side, Charlie comes face to face with his paternal ancestors. Will he be able to mend his connection with this side of his family and finally be proud of his Teo heritage?

Veteran performer, Noni Hazlehurst, goes in search of the secrets her parents held so tightly. This journey will be a revelation to Noni. She’ll come to understand the impact of war on her immediate family, and why she knows so little about her world-renowned performing ancestors.

Comedian Denise Scott’s search to find the truth about a dark family secret brings surprising results, while her Dad’s family tree produces a highly unconventional ancestor. On her maternal side, she uncovers dark secrets, and closes a chapter on a long-standing family cover-up.

All his life, Ernie Dingo has been estranged from his father’s family, on account of feeling abandoned by his own father, Tom Pepper. Ernie is brought face to face with his father’s ancestors, including an English convict. Will his journey force Ernie to re-evaluate his perceptions about the past - and his relationships in the present? Meanwhile, Ernie’s relationship with his mother’s side of the family, has been completely different: he grew up wrapped in love and warmth from his mother Bessie and grandmother Ulie. But his grandfather Jimmy Dingo remained a mystery, and Ernie sets out to discover more about this enigmatic character.

Actor and comedian is probably best known for his roles in City Homicide and Thank God You’re Here. In this series he investigates a pattern of absent fathers and discovers a man with grand but fraudulent designs.

Actor and director Simon Baker learns about a legacy left by his three-times great grandfather, and the substantial courage and fortitude of his female ancestors.

Jeff Fatt, famous as the Purple Wiggle, knows his Chinese roots go back four generations into Australia's history, but he wants details of why those ancestors came to Australia.

On a quest to to find his ancestral homeland, country music icon Troy Cassar-Daley will finally bridge the gap between his two cultural worlds.

Journalist and television personality, Lisa Wilkinson, is on a deeply personal quest to unearth the truth about her maternal ancestors.

From his portrayal of bushranger Ned Kelly to the sinister Mick Taylor in Wolf Creek, actor John Jarratt has carved a career out of playing quintessential Aussie characters. But while John wears his working class roots with pride, traces of a Chinese heritage on his mum’s side, has always been a mystery. John first throws himself into his search for his Chinese origins before investigating the epic life story of his war hero ancestor.

The program brings together the best moments of this award winning genealogical series combined with revealing insights on what it was like to take part in the show from Adam Hills, Magda Szubanski, Adam Goodes, Richard Roxburgh, Kerry O'Brien, Tina Arena, Maggie Beer and Vince Colosimo. The retrospective shines a light on Australia's cultural and historical past, and gives the viewer a real sense of how profound the journey has been for many of the Australians who have taken part.

Television journalist Kerry O’Brien embarks on a journey to uncover his Irish roots. He discovers a couple of convicts taking desperate measures in search of a better life.

Comedian Shaun Micallef unravels his father’s childhood war-time story in Malta, and discovers other ancestors who were players in some of the most extraordinary moments in modern history.

Singer Tina Arena has always wanted to find out more about where her Italian-born parents came from, a subject that has never really been talked about in her family. She is driven to find out the truth behind some family secrets and heads off to Sicily to explore her Italian roots and the tough reality of her grandparents’ childhoods.

Singer Christine Anu's ancestry is from the Torres Straits Islands. She’d like to understand why music is so important in her life. Her journey takes her not only to the Torres Straits but to England where she discovers a heritage of music and culture, beyond her wildest dreams.

Georgie Parker has created some of the most memorable women in Australian television. The women in her own family are all big personalities and this is the puzzle she sets out to solve: where does that female strength come from?

Celebrity “Country Cook" Maggie Beer is probably best known for being half of the TV duo The Cook and The Chef, as well as for her famous Pheasant Farm Pate. Tonight she embarks on a journey into her ancestry discovering a convict bigamist with a penchant for very tall tales.

Footy legend and latter day ‘Knight in Shining Armour’ Ron Barassi has always believed that actions speak louder than words. He embarks on a journey into his ancestry tracing the Barassi family line back to the Victorian Gold Rush and discovers a heart-rending tale of violence, tragedy and redemption.

Australia’s first female Foreign Minister, Julie Bishop, has always had a love for the world, and she’s now on a mission to discover where she inherited her globetrotting, adventurous spirit from.

When swimmer Lisa Curry delves into her maternal family past, she finds hard working German immigrants who risked everything to become the masters of their own destiny in Queensland. Lisa’s distant relationship with her late father had a profound effect on her life. But by tracing his life and her paternal ancestors in war-torn Ireland, Lisa comes to terms with who her father was, and finally gets to farewell him in her own way.

Bad boy larrikin actor Ben Mendelsohn embarks on a journey into his ancestry to find out if he really is related to the famous composer of the Wedding March - Felix Mendelssohn. He traces the Mendelsohn family line back to the heart of Europe and discovers a thread of musical heritage in surprising quarters as well as a heart-rending tale of success, failure and heartbreak of Dickensian proportions.

Ita Buttrose is a trail-blazer – the first female editor of a major newspaper in Australia, a publisher, broadcaster and campaigner of equal opportunity for women. She’s promoted health issues, the needs of family and Australia’s ageing population. She’s always had a passionate interest in her family’s history, particularly in trying to unravel why her family changed their name from Butters to Buttrose, but has never had the time to investigate. Driven by the fact that many of her immediate family have creative and “nomadic” lives, she’s curious to find out whether these are ancestral traits. Ita was made an Officer of the Order of Australia in 1988.

Actor John Wood discovers the secrets behind his father’s tragic capture and imprisonment in World War II.

Actor Susie Porter's family story charts dramatic advances in the field of mental health treatment in Australia.

TV personality Scott Cam reveals his paternal family changed their surname from Caminiti to Cam during WWII. But, beyond this historical detail, Scott knows little about his Italian ancestors.

Actor Vince Colosimo unravels the truth about his grandfather’s extraordinary war experience and tries to find out who his mysterious grandmother was.

Dennis Cometti is the best known and most authoritative Australian Rules football commentator in Australia. Millions of football fans around the nation admire and respect his droll, quirky commentary. He knows everything there is to know about the genealogy of the AFL, confidently recalling any player’s pedigree, background and performance statistics – he spends hours researching the history of the game. But ask the ‘footy statistic guru’ about his own family and it is an entirely different story. He claims he has never had time to look into his own history. Dennis wants to reconnect with his Italian identity. Everyone else identifies with him being Italian and he’s bemused because he doesn’t - he can’t even speak the language. Who Do You Think You Are?® takes Dennis on a journey to explore his rich Italian heritage.

Richard Roxburgh has become well known for playing different complicated characters, but knows little of the people in his own past. H e founds out about his family‟s footprints in an unexpected corner of the world.

Jack Thompson looms large in the Australian imagination from such iconic films as Breaker Morant and The Man from Snowy River. Born John Hadley Pain in Sydney in 1940, he knows very little about the history of his biological family. When his mother died, Jack was sent to a local boarding school as their father Harold was unable to look after them. Eventually Jack was adopted by the Thompson family and he took their name. For the first time, Jack Thompson, legend of the Australian screen, discovers the history of his biological relations and the importance of us knowing our own stories.

Actress Asher Keddie sets out to find the origins of her creative passions, discovering a story from the past with eerie parallels to her own life.

Entertainer Rove McManus discovers his Great Grandfather’s role in the violent Kimberley frontier, and the astonishing source of his own creative gifts.

Actor John Howard follows his Grandfather’s trail through the horrors of the Great War, finding a promising military career ruined by a single regrettable act.

John Newcombe's search will propel him back to a pivotal time in NSW when the penal colony was transforming into a democracy. John's paternal ancestor played an important role in the fight for freedom of the press. But behind the facade of middle-class respectability, John will discover his two-times-great grandmother was hiding her convict past. Then, exploring his maternal line, John follows his three-times great grandfather's footsteps to the Loyalty Islands, now part of New Caledonia. John's forebear was hoping to trade sandalwood, but the expedition was a disaster. At the site of a bloody ambush John learns of the cannibalistic tribe his ancestor encountered.

When Former Prime Minister Malcolm Turnbull opens the book on his family history, curiosity turns to fascination when he discovers a mysterious unclaimed fortune.

Denise Drysdale takes a DNA test, and it’s no surprise to find her family hails from Scotland. But it is a shock to discover she also has DNA links to Northern Ireland. Denise finds her maternal 3 times great grandparents, John and Mary Fanning, left Northern Ireland with their children, and miraculously survived an horrific voyage to Australia. On her father's side, Denise uncovers the humour she’s looking for, in her great grandmother Betsy Drysdale, but the flip side of Betsy’s life is one of a sad struggle with alcoholism and despair.

Myf Warhurst sets out to learn the truth about a 'handshake adoption' in her paternal line, and is surprised by what she learns.

Actor and philanthropist Paula Duncan looks into her ancestry and finds a tale of hardship turned on its head by the gold rush.

Chef Matt Moran discovers a convict lineage hailing from Ireland, a criminal heritage that is broken by a heroic, hardworking ancestor, and a 100-year-old woman he met as a child.

Netball champion Liz Ellis investigates the truth around the identity of her dad's father, and digs into the mystery of her mum's `cranky granny'.

Sandra Sully hopes to learn more about her family's reverence for war service, and discovers her maternal grandfather had a previously unknown experience.

Journalist Jenny Brockie uncovers her mother's family history and learns her distant relatives were a gang member and a brothel owner from Ireland.

Internationally celebrated actor Geoffrey Rush believes he hails from a long line of farmers but an exploration of his heritage sees him discover an ancestor fighting for justice in the face of corruption and another desperate to succeed in a golden age of creativity.

Shane Jacobson's father, Ron, was born into a family of carnival workers and lived in a tent until he was 21. They know nothing of their ancestry, but Shane's convinced they come from Viking stock. His crusade will take him to Finland where Shane's great grandfather took drastic steps that echo down the Jacobson line. His journey will take Shane to a medieval church where his ancestor was forced to sit on a shaming stool to atone for her sexual crimes. His search for the truth behind his Viking roots is answered, and in a farmhouse Shane finds his extended Finnish family.

Rebecca Gibney attempts to find out more about her past and travels to New Zealand. The journey takes her from Parihaka to Wellington to Auckland, where she learns some shocking truths about her family history.

Patti Newton is one of Australia’s most recognisable faces. She’s been performing since the age of four and has always wondered where her love of performing has come from. These days Patti’s greatest joy in life is her four grandchildren. However, she knows very little regarding her paternal grandmother and is determined to find out why she was never spoken of.

Actress Marta Dusseldorp has become a household name on Australian television screens, playing strong female characters in Janet King, A Place To Call Home, and Jack Irish.

Geoffrey Robertson is one of Australia’s best-known expatriates. The UK-based human rights advocate and occasional Hypotheticals presenter has been mixing with the famous and infamous ever since he exploded onto the swinging sixties scene to help defend the Oz magazine obscenity case. "People often come up to me and say 'Oh you Australians are so refreshing.' What they mean is 'Rack-off you loud-mouthed colonial.'" He is the consummate self-made man and his razor-sharp legal mind gives short-shrift to the nature-nurture debate. Genes don’t fit his world view. But when he starts looking into his family tree in Who Do You Think You Are?® he finds some remarkable parallels in the expatriate lives of his forebears. Is Geoffrey Robertson the descendant of a right royal bastard or a very wiley entrepreneur? The jury is still out.

Adam Goodes learns more about his aboriginal heritage, journeying into the remote Flinders Ranges finding evidence of his ancestors from thousands of years ago.

Best known for her alter ego Kath Day-Knight from the hugely popular Kath and Kim series, Jane Turner is an icon of Australian comedy. Her paternal line takes Jane back to her three-times-great grandfather, who was one of Western Australia's pioneering British settlers. Jane will uncover the desire that drove her wealthy ancestor to endure incessant misfortune. Then, uncovering her father's actions as a fighter pilot in the Korean War takes Jane inside the Demilitarised Zone on the border of North Korea.