Gerald Stuart O'Loughlin, Jr. (b. December 23, 1921, New York City) is an American television, stage, and film actor and director who was primarily known for playing tough-talking and rough-looking characters.
Description above from the Wikipedia article Gerald S. O'Loughlin, licensed under CC-BY-SA, full list of contributors on Wikipedia.
A Hatful of Rain
As Chuch
Cop Hater
As Detective Mike Maguire
City Heat
As Counterman Louie
Ice Station Zebra
As Lt. Cdr. Bob Raeburn
In Cold Blood
As Harold Nye
The Organization
As Jack Pecora
Twilight's Last Gleaming
As Brig. Gen. O'Rourke
Riot
As Grossman
Desperate Characters
As Charlie
The Secret Kingdom
As Chartwell
Lovers and Lollipops
As Larry
A Love Affair: The Eleanor and Lou Gehrig Story
As Joe McCarthy
Pleasure Palace
As Benny Marfo
The Two Worlds of Charlie Gordon
As Joe
Child's Cry
As Sam Van Buren
The D.A.: Murder One
As Sgt. Andrushian
Crime of the Century
As Commissioner O'Ryan
Something for Joey
As John Cappelletti Sr
Quicksilver
As Mr. Casey
The Crash of Flight 401
As Larry Cross
Ensign Pulver
As LaSueur
Murder at the World Series
As Moe Gold
Crimes of Passion
As Ben (uncredited)
In the Arms of a Killer
As Art Seidensticker
The Valachi Papers
As Ryan, federal agent
Perry Mason: The Case of the Notorious Nun
As Monsignor Kyser
Dan August: Once Is Never Enough
As Dominic Lazar
Frances
As Lobotomy Doctor
Brothers-in-Law
As Bud Oliver
A Matter of Life and Death
As Mr. Duffy
Wilson's Reward
As Ginger Ted Wilson
Detour to Terror
As Martin Brain
Murder, She Wrote
As Ben Oliver
Titans
M*A*S*H
As General Schwerin
The Rookies
As Lt. Ed Ryker
Trapper John, M.D.
T. J. Hooker
As Don Burnett
Fame
The Division
The F.B.I.
As Carl Munger
Judging Amy
As Mr. Sadler
Simon & Simon
Hawaii Five-O
As Charlie Swanson
Quincy, M.E.
Highway to Heaven
Room 222
Naked City
As Mr. Hackett
Charlie's Angels
As Jake Webner
Mannix
Gunsmoke
As Grant Shay
Mission: Impossible
As Bert Gordon
Cannon
Cover Up
Chicago Hope
Going My Way
Felony Squad
Run for Your Life
As Ralph Bronson / Timothy
Cimarron Strip
Jessica Novak
Matt Houston
Then Came Bronson
Automan
As Cpt. E.G. Boyd
Our House
As Joe Kaplan
Judd for the Defense
The Philco Television Playhouse
Ben Casey
Suspense
Dr. Kildare
As Gus Pochek
The Asphalt Jungle
The Eddie Capra Mysteries
Kraft Mystery Theatre
The Green Hornet
As Ben Wade
Nichols
As Roarke
Code Red
Roots: The Next Generations
As Capt. Bowker
Blind Ambition
As John J. 'Jack' Caufield
The Blue and the Gray
As Sergeant O'Toole
Women in White
As Richard Payson
12 O'Clock High
As Maj. Joe Morse
Wheels
As Rusty Horton
Dan August
As Dominic Lazar
Ironside
As Lt. Jimmy Burwell
ER
As George