The SBS genealogy series, now in its ninth series, looks back into history to uncover unknown stories about the heritage of some of Australia’s most well-known personalities.

On Tuesday night it explored Todd’s past thanks to the show’s researchers and historians dotted across the country.

The son of divorced parents, Todd was brought up by his mother admits he knows “nothing about my father’s side and they gave me my name”.

“I don’t know anything about my family history. My mother’s parents, that’s kind of where the end of my knowledge with my family stops,” he said at the start of the show.

The show’s research into Todd’s heritage uncovered convicts and scandals buried for generations.

The first place the entertainer was taken to find out about his father’s side of the family was to Bathurst to discover more about his great great grandfather Francis McKenney.

There, Todd met with historical researcher Christoper Morgan and they visited the Bathurst District Historical Society Museum and Bathurst Court to learn more about Francis’ life, work and marriage in the city.

Mr Morgan said it was an honour and a privilege to help Todd learn more about this family history.

“It was a really special opportunity to show our historical collection with someone who is a celebrity … it was a really personal story,” he said.

While Mr Morgan said it was a lot of fun to spend time with Todd, it was important to present the entertainer’s history “carefully and clearly.

“For everybody who helped research this project it reminds us we are custodians of deeply personal stories,” he said.

“My hope is Todd McKenney will always remember how welcome he is here and how we are part of his story.

“As Bathurstians it really is very important we are in the narrative of the nation.”

Visit www.sbs.com.au/ondemand to catch up with this episode.