Hawaii Five-O is an American police procedural drama series. Place in Hawaii, the series aired from 1968 to 1980 for 12 seasons, also continues to be reruns. Detective Lieutenant Steve McGarrett, the head of some state police task force which was based on an actual unit that originated in the 1940s under law was portrayed by jack Lord. The theme music written by Morton Stevens became especially popular. Many episodes could wind with McGarrett instructing his weak to"Novel Celtics, Danno!" , sometimes establishing a fee such as"murder one".