Paul Hollywood looks into his family's past this week. His journey takes him first to North Africa where his grandfather had only just completed his training when he found himself in Tunisia as part of the Light Anti-Aircraft division tasked with protecting infantry from enemy air attack during a major Allied offensive to take Tunis from the Germans. He then makes his way to Italy where he learns his grandfather was part of the landing force that became surrounded by German forces and trapped on the beaches at Anzio for four months.

Jane Seymour was born Joyce Penelope Wilhelmina Frankenberg and knows that there is Jewish ancestry on her father’s side of the family. She wants to find out about her Jewish great aunts Michaela and Jadwiga and their lives under Nazi occupation.

Actor Derek Jacobi discovers that he is descended from a Huguenot fleeing persecution.

Jerry Hall knows her father’s family originally came from Oldham, but wants to discover how they ended up in America.

Gareth Malone wants to know how far back his musical gene goes and he attempts to find out more. His investigations into his mother's side of the family take him to London's West End, where he learns that his great-great-grandfather was a star of musical comedy and performed in front of George V.

Actress Anne Reid was close to her father but knows very little about his family. She only has a couple of clues to go on - the name of a house in Scotland and a family story that her father's side were ministers in the church. These clues soon put her on the trail of her great-great-grandfather John Reid - not a minister at all, but a schoolteacher in Fife with a sideline in forgery. When John's forgeries land him in the dock his life takes an unexpected turn - to Tasmania, on a convict ship.

Journalist Frank Gardner was very close to his late mother and is keen to know more about her side of the family. Frank's mother always told him that the family arrived in Britain with the Normans. Frank sets off to discover if there is any truth in the rumour. Along the way, he traces his family tree back to his ten times great-grandfather Sir Michael Stanhope - a knight of the Tudor court - who was accused of treason. But Frank's journey doesn't end there, and he is astonished to discover that his mother's suspicions are closer to the truth than he could ever have imagined.

Journalist Anita Rani never met her maternal grandfather Sant Singh - all she has been told is that he suffered terrible tragedy at the time of India's Partition. Anita's mother also tells her that Sant had another wife and family before marrying Anita's grandmother. Armed with this knowledge, Anita travels to India to see if she can find out more about her grandfather's first family - and discover what happened to them during Partition. It's an extraordinary and harrowing journey for Anita.

Actor and writer Mark Gatiss has always had a love of storytelling and a passion for the ghastly and ghoulish but has always wondered where it comes from. So when he discovers that his mother's side of the family goes back five generations to the wilds of Northern Ireland, his imagination is awakened. Mark travels to Ireland, where he untangles a tale of rags to riches and finds out that his family were storytellers and (allegedly) vampire slayers!

Frances de la Tour's family tree holds a tantalising clue which hints at aristocratic ancestors. Hot on the trail of her three times great grandmother Frances uncovers a story of a secret lover, an illegitimate child and a landmark divorce case. But the scandal doesn't stop there. Tracing back another generation Frances uncovers the tragic story of Sophia Delaval - and traces her roots back to Seaton Delaval, the historic family residence.

'Harry Potter' star Daniel Radcliffe discovers that the Hatton Garden robbery of his great-grandfather’s jewellery business was far more dark and dramatic than he ever imagined, while an unseen cache of his great-great-uncle’s letters reveals a heart-wrenching First World War love story.

Actor Naomie Harris’s dramatic discoveries in this episode inspire her to anger, sadness and tears of joy. On a journey from Trinidad to Grenada to Jamaica, Naomie exposes her four-times-great grandfather’s involvement in the exploitation of so-called 'liberated Africans' shortly after the abolition of slavery, is delighted to discover the identify of her African five-times-great grandmother, and, in nearer generations, uncovers a family story of tragic poverty in Jamaica’s capital, Kingston.

In a first for the series, father-and-son comedy double-act Jack and Michael Whitehall join forces to investigate their family tree.

Oscar-winning actor Kate Winslet follows a rumour of Scandinavian ancestry on her mother's side of the family and is delighted to find that she has Swedish heritage.

Canadian comedian Katherine Ryan’s investigation of her family history leads her to a Methodist minister and his family in colonial Nova Scotia, cod traders in Newfoundland, and eventually to her English roots in Dorset.

Paul Merton traces the life of his maternal grandfather and discovers that he was involved in some of the key events that led to Irish independence in the 1920s.

Sharon Osbourne uncovers the difficult circumstances of her mother’s and grandmother’s lives, and is stunned to learn that her great-grandmother was born in the US.

Former TOWIE star Mark Wright discovers that his ancestors included an Andalucian master swordsman and a Spaniard who was burned at the stake during the Inquisition.

Vicky McClure goes on an emotional journey to Taiwan to find out what happened when her great-grandfather was captured as a prisoner of war in World War Two.

Paddy McGuinness uncovers his grandfather’s vital work in World War Two, how his other grandfather was involved in the Boer War and the family’s journey from Ireland to Bolton.

Melanie Chisholm is fascinated to discover that her ancestors include a moneylender, a campaigner for social reform and a family fleeing the famine in Ireland.

Actor, presenter and deaf rights campaigner Rose Ayling-Ellis goes in search of her family history. She encounters a pub landlady and hunts for a rumoured Italian connection.

Jessica Ennis-Hill discovers the truth behind a family mystery and finds out about her Jamaican four-time great-grandfather’s journey from enslavement to land ownership.

Olly Murs explores his grandfather’s Latvian roots, discovers his great-grandparents were circus performers, and how a wartime decision led to a tragic family estrangement.

Gemma Collins goes on an emotional journey discovering why her mother was fostered; connecting with a long-lost cousin; and finding out her Essex roots go back over 200 years.