Warren Meyer was a keen bushwalker who always came prepared for a hike. 

When he vanished in the wild terrain of the Yarra Ranges, police were baffled. 

Ashlynne McGhee investigates whether his disappearance could be linked to the other unsolved mysteries of Victoria's high country.

This is a repeat of a program that aired in March 2021.

Summer Season: The place where people mysteriously disappear

Background Briefing brings you true stories not everyone will want you to hear.

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How the Commonwealth Bank tried to stop a royal commission by using dirt files, intimidation, threats and surveillance against whistleblowers and journalists. Reporter Adele Ferguson investigates.

The whistleblowers who stared down threats from Australia's biggest bank

Three dead dolphins turn up in an oil spill.

The whistleblower who believed his employer was covering up an oil spill

"Simone" arrived on a remote island to help asylum seekers. But she witnessed something there that convinced her to leak over 2000 documents. Reporters Paul Farrell and Maddison Conaughton investigate what happened.

The whistleblower who exposed Australia’s secretive offshore detention system

When patients start unexpectedly dying at a regional hospital, nurse Toni Hoffman takes a big risk to blow the whistle on a negligent surgeon. But years later, it's still unclear why she was ignored for so long.

The Whistleblower who brought down Australia's Dr Death

Kathy Jackson was once heralded as a revolutionary who shone a bright spotlight on union corruption but she too was later found to be a fraudster who had misappropriated hundreds of thousands of dollars in union members' money. So who was the man responsible for blowing the whistle on her? 

Reporter Annika Blau investigates.

Summer Season: The place where people mysteriously disappear

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