Steven J. McGarrett (portrayed by Alex O'Loughlin) is the main protagonist of the CBS series Hawaii Five-0 which is a re-make of the 1968-80 series of the same name. McGarrett is the leader of the Five-0 Task Force stationed in Honolulu, Hawaii. He is a former Navy SEAL (retired at the rank of Lieutenant Commander). The eldest of two children, Steve McGarrett grew up with his younger sister, Mary, and his parents, his father, John and mother, Doris in Honolulu, Hawaii. Unknown to them, their father was investigating the Yakuza and Hiro Noshimuri (which ultimately got their mother killed).