The then 35-year-old mother of five was last seen at her Maraenui home on June 23, 2007. Her car was later located, empty of petrol, at the former Westshore Service Station.
The programme's host, retired Detective Inspector Graham Bell, spoke to Hawke's Bay Today in March and was anxious to wrap up the inquiry, as the sixth anniversary of her disappearance approached.
"The passage of time is not always a bar to getting a result," he said.
Earlier Detective Senior Sergeant Emmett Lynch, of the Hawke's Bay CIB, said the disappearance was completely out of Ms Tumanako's character. Her father, Joe Tumanako, took on care of his five grandchildren when she disappeared and has raised them during a tough six years.
As well as profiling the disappearance on Police Ten 7, police were still working with forensics on DNA profiles taken from the car she had been driving at the time she went missing.
* Police Ten 7: TV2: 7.30pm