John Joseph Patrick Ryan (December 30, 1920 -- January 21, 1998), best known by his stage name, Jack Lord, was an American television, film and Broadway actor and director and producer. He was known for his starring role as Steve McGarrett in the CBS television program Hawaii Five - O, which ran from 1968 to 1980.
who played the original mcgarrett in hawaii five-o
John Joseph Patrick Ryan (December 30, 1920 -- January 21, 1998), best known by his stage name, Jack Lord