
Acting
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. He was known for his starring role as Steve McGarrett in the American television program Hawaii Five-O from 1968 to 1980. Lord appeared in feature films earlier in his career, among them Man of the West (1958). He was the first actor to play recurring character Felix Leiter in the first James Bond film Dr. No.
Description above from the Wikipedia article Jack Lord, licensed under CC-BY-SA, full list of contributors on Wikipedia.

M Station: Hawaii
as Adm. Henderson

Cocoon
as Det. Steve McGarrett

The Counterfeit Killer
as Don Owens

The Name of the Game Is Kill
as Symcha Lipa

The Ride to Hangman's Tree
as Guy

The Doomsday Flight
as Special Agent Frank Thompson

Dr. No
as Felix Leiter

Walk Like a Dragon
as Lincoln 'Linc' Bartlett

The Hangman
as Johnny Bishop

Man of the West
as Coaley

Wolfe
as Eric Haim · 1 ep.

The Glen Campbell Goodtime Hour
as Self · 1 ep.

Hawaii Five-O
as Det. Steve McGarrett · 284 ep.

Ironside
as John Trask · 1 ep.

The High Chaparral
as Dan Brookes · 1 ep.

The Invaders
as George Vikor · 1 ep.

The F.B.I.
as Frank Andreas Shroeder · 1 ep.

Laredo
1 ep.

The Loner
as Reverend Booker · 1 ep.

12 O'Clock High
as Lt. Col. Preston Gallagher · 1 ep.