Which character does Alex O'Loughlin play in "Hawaii Five-O"?
Steve McGarrett Steve McGarrett is a fictional character from "Hawaii Five-O" who serves as the leader of the Hawaii Five-0 (5−0) crime task force. McGarrett was originally played by Jack Lord and also by Alex O'Loughlin in the remake. He is partner to Detective Danny "Danno" Williams.
Jason O'Mara Jason O'Mara (born August 6, 1972) is an Irish-American actor. He has starred in the American television network dramas "In Justice", "Life on Mars", "Terra Nova", "Vegas", and "Agents of S.H.I.E.L.D."