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. Alex O'Loughlin: Alex O'Loughlin (born 24 August 1976) is an Australian actor, who plays Lieutenant Commander Steve McGarrett on CBS' remake of the TV series "Hawaii Five-0".
Steve McGarrett