Former Queensland Assistant Commissioner Ross Barnett takes us through his most confounding case. Each crime there was a different MO, and there was only one connection.

Detective Superintendent Deborah Wallace takes us through an incredible story that begins with a small drug deal in a country pub in regional NSW.

No body, no witnesses, no DNA, so how did Detective Dennis Bray solve the most notorious kidnapping in Australia's history?

An elderly couple are tied up and strangled in their own home, but there are no witnesses and no apparent MO.

Detective Jeff Maher takes us inside the hunt for one of Australia's most evil serial killers. Maher and his team brought to justice the man responsible for 3 murders.

Former Assistant Commissioner, Michael Willing takes us through the seven year hunt for one of Australia's most notorious murderers, Malcolm Naden.