Jason Duclair is a minor antagonist who first appears in the 16th episode of Season 5 of Hawaii Five-0, Nanahu.
He appears again in Season 6's Ka Pono Ku'oko'a, only to collapse to death at the end of the episode.
Jason Duclair is a wanted serial arsonist who targets couples in Oahu. He has been imprisoned and escaped multiple times, but eventually turns himself in, unable to forgive himself for all of the chaos and destruction he had caused. He soon attempts to escape again, now with his fellow inmates during an intentional chemical spill. Duclair tries to catch up with Adam Noshimuri but collapses because of his severe wound. Later, an hacker Aaron Wright (brother of hacker Ian Wright) hacked in to the Halawa security system and broke Duclair out. He later was captured by Five-O but escaped later to die in a wildfire he set.
Duclair is seen to have some sort of trait of loyalty and benevolence as he has aided Adam by setting a man working for the Yakuza, dressed as a police man, on fire.