Fans received the news of this series' renewal with relief after it was revealed that the stars' contracts were up for renewal at the end of Season 8.

The season nine premiere is an homage to the series’ roots as it re-tells the pilot of the original 1960s Five-0’s pilot entitled Cocoon. McGarret allows his supposedly dead nemesis, Wo Fat, to kidnap him and finds himself cocooned in a sensory-deprived state as part of his torture.