Imagine if you could prevent diseases by predicting exactly who would get them, when they would strike, and then taking action before it happens.
It might once have seemed like science fiction, but it's rapidly becoming part of mainstream medicine.
By tracking down genetic mutations, whole families can have their lives extended.
SUNDAY goes inside the world of the Kiwi gene detectives, and speaks to those getting help often before they know they are sick.
Cameras:Ken Dorman, Dave Pierce, Vaughan Scott
Billy Connolly...back in New Zealand and shooting from the hip.
This time his health is centre stage.
In an exclusive interview with SUNDAY the comedian reveals his secret to eternal youth, his conquest of cancer and the surprising upshot of his latest challenge...Parkinson's Disease.
Cameras:Dave Pierce, Cameron Williams
Sunday: 7pm; TV ONE