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Gervase Duan Spradlin (August 31, 1920 – July 24, 2011) was an American actor. Known for his distinctive accent and voice, he often played devious authority figures. Description above from the Wikipedia article G. D. Spradlin, licensed under CC-BY-SA, full list of contributors on Wikipedia.

The Godfather: The Complete Epic 1901–1959
as Sen. Patrick Geary

Dick
as Ben Bradlee

The Long Kiss Goodnight
as President

Dark Skies
as Elliot P. Grantham / Patient Zero

Dark Skies

Riders of the Purple Sage
as Pastor Dyer

Nick of Time
as Mystery Man

Canadian Bacon
as R.J. Hacker

Ed Wood
as Reverend Lemon

Clifford
as Parker Davis

Telling Secrets
as Walter Jefferson

Cruel Doubt
as George Bates

Intruders
as General Hanley

Carolina Skeletons
as Hiram Stoker

Shoot First: A Cop's Vengeance
as Chief Hogan

The War of the Roses
as Harry Thurmont

War and Remembrance
as Raymond A. Spruance
Nutcracker: Money, Madness & Murder
as Franklin Bradshaw

Houston: The Legend of Texas
as President Andrew Jackson

Resting Place
as Sam Jennings

Call to Glory
as General Thornton

Tank
as Sheriff Buelton

The Lords of Discipline
as Gen. Bentley Durrell

Wrong Is Right
as Philindros

The Greatest American Hero

The Formula
as Arthur Clements

The Jayne Mansfield Story
as Gerald Conway

North Dallas Forty
as B. A. Strothers

Apocalypse Now
as General Corman

And I Alone Survived
as Bob Elder

Maneaters Are Loose!
as Gordon Hale

Mario Puzo's The Godfather: The Complete Novel for Television
as Sen. Patrick Geary

MacArthur
as General Eichelberger

One on One
as Coach Smith

The November Plan
as Gen. Winfield

Rich Man, Poor Man - Book II
as Sen. Dillon

City of Angels

Judgment: The Court Martial of Lt. William Calley
as Military Judge

The Godfather Part II
as Senator Pat Geary

Kung Fu
as Lucas Bass

Search

The Only Way Home
as Philip

Columbo
as Martin Hammond

The Hunting Party
as Sam Bayard

Who Killed the Mysterious Mr. Foster?
as Reverend Foster

Alias Smith and Jones

Monte Walsh
as Hal Henderson

Zabriskie Point
as Lee's Associate

Dial Hot Line
as Dr. Stone

Tora! Tora! Tora!
as Cmdr. Maurice E. Curts (uncredited)

Hell's Angels '69
as Detective

Number One
as Doctor Tristler

Adam-12
as Joe Johnson

The Outsider

It Takes a Thief
as Col. Collins

El juicio
as Kermin

Will Penny
as Anse Howard

Cimarron Strip

Pistols 'n' Petticoats

The Big Valley
as Rhodes