Jim Chalmers

In a 7NEWS Spotlight exclusive this Sunday at 8.50pm on Channel 7 and 7plus, the father-of-three opens up to 7NEWS Political Editor Mark Riley in a very candid interview.

The Treasurer reveals his personal struggles, admitting to a past of excessive drinking and sharing a major health battle that changed his life forever. "I remembered Laura saying to me, you look really unwell. My face was kind of white... I was really unwell."

Mr Chalmers also offers some much-needed good news about cost-of-living crisis, saying the worst days are behind us. "We are confident that having been through a very difficult time together, better days are ahead."

Also, this week on 7NEWS Spotlight, Michael Usher explores the investigation into the disappearance of William Tyrrell.

Ten years since the three-year-old went missing and we are still no closer to knowing what happened to the little boy.

Ahead of the long-stalled coronial inquest reopening, Usher speaks with former NSW Police Assistant Commissioner Mick Willing, former Homicide Detective Gary Jubelin and News Corp journalist Dan Box, asking why there are still no answers.

Jubelin, who oversaw the initial investigation, says he rigorously examined William's foster mother, who has been a person of interest to NSW Police for the past four years.

"There was no evidence that was suggestive of the foster mother having knowledge or involvement in William's disappearance. At the time I was taken off the investigation, there were other legitimate persons of interest that required further exploration."

With no forensic evidence or clear leads, what went wrong with the investigation?

And don't miss a special exclusive interview with iconic singer-songwriter Cyndi Lauper. Cyndi sits down with7NEWS US Bureau Chief David Woiwod for her only Australian TV interview ahead of her "Girls Just Wanna Have Fun" Farewell World Tour.