•
Misleading Lady (1932) as McMahon – Asylum Guard •
Spitfire (1934) as West Fry •
Wild Gold (1934) as Poker Player (uncredited) •
The Mystery of Edwin Drood (1935) as Village Lamplighter (uncredited) •
Union Pacific (1939) as Foreman (uncredited) •
The Fight for Life (1940) as 2nd Teacher •
Deep Waters (1948) as Nick Driver •
The Chevrolet Tele-Theatre (1948) as Sam Hobbs •
Johnny Allegro (1949) as Schultzy •
Lust for Gold (1949) as Deputy Ray Covin •
Anna Lucasta (1949) as Noah •
Intruder in the Dust (1949) as Sheriff Hampton •
The Kid from Texas (1950) as O'Fallon •
Comanche Territory (1950) as Dan'l Seeger • ''
Winchester '73'' (1950) as Wyatt Earp • ''
It's a Small World'' (1950) as William Musk – Father •
Broken Arrow (1950) as Ben Slade •
Convicted (1950) as Convict Mapes •
To Please a Lady (1950) as Jack Mackay •
Double Crossbones (1951) as Tom Botts •
Bright Victory (1951) as Mr. Lawrence Nevins •
The Tall Target (1951) as Homer Crowley – Train Conductor •
Racket Squad (1951) as Harry Robinson •
The Barefoot Mailman (1951) as Dan Paget – Miami Mayor / Postmaster •
Salt of the Earth (1954) as Sheriff •
Mobs, Inc. (1956) as Harry Robinson (archive footage) •
Advise and Consent (1962) as Senate Minority Leader •
East Side/West Side (1964) as Brian Lincoln •
Black Like Me (1964) as Truckdriver • ''
The Trials of O'Brien'' (1966) as Judge Lindemann / Sheldon •
Seconds (1966) as Old Man •
The Crucible (1967) as Giles • ''
Garrison's Gorillas'' (1967) as Laski •
In Cold Blood (1967) as Prosecutor • ''
The President's Analyst'' (1967) as Dr. Lee-Evans •
I Spy (1968) as Uncle Harry •
Run for Your Life (1968) as Judge David P. Andrews •
Of Mice and Men (1968) as Candy •
Mission: Impossible (1968) as Doc •
The Invaders (1968) as Hank Willis •
Bandolero! (1968) as Pop Chaney •
Gunsmoke (1968) as Slocum •
Certain Honorable Men (1968) as Malcolm Stoddard •
Mayberry R.F.D. (1969) as Captain Wolford •
Here Come the Brides (1969) as Benjamin Pruitt •
Bonanza (1969–1971) as Ferris Callahan / Zach Randolph / Calvin Butler •
Hawaii Five-O (1969) as Professor Harold Lochner •
Then Came Bronson (1969) as Oliver Hidemann •
Daniel Boone (1969) as Adam •
The Reivers (1969) as Boss McCaslin •
I Walk The Line (1970) (Grandpa Tawes voice dub) •
The Name of the Game (1970) as Mac •
The Moonshine War (1970) as Mr. Baylor •
The Brotherhood of the Bell (1970) as Mike Patterson •
Pieces of Dreams (1970) as The Bishop •
The Bold Ones: The Senator (1970–1971) as Elliot Leveridge / Judge Scanlon / Ralph Turner •
The Bill Cosby Show (1970) as Mr. Kane •
Medical Center (1970–1974) as Coughlin •
Shooting the Moonshine War (1970) as Himself (uncredited) •
The Bold Ones: The Lawyers (1970–1971) as Elliot Leveridge / Judge Scanlon / Ralph Turner •
Sam Hill: Who Killed Mr. Foster? (1971) as Simon Anderson •
Love, American Style (1971) as Desk Clerk (segment "Love and the Pulitzer Prize") •
Brother John (1971) as Doc Thomas • ''
Cade's County'' (1971) as Hurley Gaines •
Alias Smith and Jones (1971) as Seth • ''
O'Hara, U.S. Treasury'' (1971) as Singlefoot •
The Jimmy Stewart Show (1971) as Uncle Everett •
The Waltons (TV series) (1972–1978) as Zebulon Tyler Walton •
Dear Dead Delilah (1972) as Roy Jurroe •
The Scarecrow (1972) as Justice Gilead Merton •
Bewitched (1972) as President George Washington •
The Sixth Sense (TV series) (1972) as Rev. Jordan •
Jeremiah Johnson (1972) as Bear Claw •
The Rowdyman (1972) as Stan •
Napoleon and Samantha (1972) as Grandpa •
Night Gallery (1973) as Walt Peckinpah •
Columbo: "
A Stitch in Crime" (1973) as Dr. Edmund Hidemann • ''Brock's Last Case'' (1973) as J. Smiley Krenshaw •
Harry O (1973) as Len McNeil •
Savage (1973) as Joel Ryker •
The Gift of Terror (Made for TV Film) (1973) as Ben •
Kung Fu (1973) as Judge Emmitt Marcus • ''
Isn't It Shocking?'' (1973) as Lemuel Lovell •
Doc Elliot (1973) as Paul Bartlett •
Executive Action (1973) as Harold Ferguson •
The Hanged Man (1974) as Nameless •
Silence (1974) as Crazy Jack •
Honky Tonk (1974) as Judge Cotton •
Memory of Us (1974) as Motel Manager •
Hurricane (1974) as Dr. McCutcheon •
The Manchu Eagle Murder Caper Mystery (1975) as Dr. Simpson •
The Night That Panicked America (1975) as Reverend Davis •
The Blue Bird (1976) as Grandfather •
Law and Order (1976) as Pat Crowley •
Moving Violation (1976) as Rockfield •
Hollywood on Trial (1976) as Himself •
Starsky & Hutch (1976) as Commodore Atwater •
Hee Haw (1976) as Himself •
The Billion Dollar Hobo (1977) as Choo-Choo Trayne •
Eight Is Enough (1977) as Sam •
The Love Boat (1977) as Franklyn Bootherstone •
Unknown Powers (1978) as Host •
CBS: On the Air (1978) •
The Mafu Cage (1978) as Zom (posthumous release) •
A Woman Called Moses (1978) as Thomas Garrett (final role, posthumous release) ==Discography==