Detectives in Sydney investigate the case of a young woman who vanished in mysterious circumstances; in Melbourne, police race to find a man missing during a storm.

Police launch two large-scale searches to find a father of two who is missing off the WA coast, and a navy veteran lost in hazardous bushland.

A man goes missing in mysterious circumstances; a patient flees the hospital after a suspected heart attack but no one knows why.

When police hit a dead end, a young woman stops at nothing to find her missing brother. New breakthrough forensic techniques may hold the secret to a 30-year-old mystery.

A father disappears in crocodile-infested waters; a young girl walks out of her family home and never returns.

Two men go missing in a remote bushland after a boys' weekend goes terribly wrong; detectives discover disturbing new details in a 20-year-old cold case of a missing teenager.