A team of detectives begin examination of the case of Mona Elizabeth Blades, an 18-year-old New Zealand woman who disappeared in 1975 while hitchhiking.

Taxi driver Do Trieu disappeared from his Wellington home in August 2008. The body of the 68-year-old Vietnamese father and grandfather has never been found.

Japanese traveller Kayo Matsuzawa flew to Auckland on 11 September 1998, and checked into a hotel before heading out to sightsee. Eleven days later, her decomposing body was found. Detectives investigate what may have happened.

An exploration of the case of Tuitania Barclay, who disappeared from Dunedin in 2002. She vanished from her home, leaving not only her children, but her phone, wallet, clothes and car.

Nearly two decades after 17-year-old Jane Furlong went missing in 1993, her remains were found buried in sand dunes 90km from the last confirmed sighting of the young mother. The team reinvestigate this grisly discovery in the hope of answers.

Detectives look at the case of David Robinson, whose decomposing body was found on 28 December 1998, with a single gunshot wound on the forehead, execution-style, on a remote beach.