Detectives in Sydney investigate the case of a young woman who has vanished in mysterious circumstances, while 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 goes missing off the WA coast and a navy veteran lost in hazardous bushland.

A man goes missing in mysterious circumstances, and 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, while a young girl walks out of her family home and never returns.

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