•
Great Catherine (1948, TV Movie) •
Norby (1955) as Preston (a.k.a) Pearson Norby (canceled after 13 episodes) •
Alfred Hitchcock Presents (1957) (Season 2 Episode 28: "One More Mile to Go") as Sam Jacoby •
The Strawberry Blonde (1959, TV Movie) as Biff Grimes •
The Twilight Zone, "
Escape Clause" (1959) as Walter Bedeker •
Wagon Train (1960) ('The Shad Bennington Story') as Shadrack Bennington •
Naked City, "The Multiplicity of Herbert Konish" (1962) as Herbert Konish •
Teahouse of the August Moon (1962 TV movie) as Sakini •
Kings of Broadway (1962, TV Movie) (unsold pilot) •
The Alfred Hitchcock Hour (1963) (Season 1 Episode 15: "The Thirty-First of February") as Andrew Anderson •
Cowboy and the Tiger (1963, TV Movie) as Narrator (unsold pilot) •
Lamp at Midnight (1966, TV Movie) as Father Firenzuola •
Batman (1966, guest villain, episodes 13, 14, 69, 70) as
The Mad Hatter •
Arsenic and Old Lace (1969, TV Movie) as Teddy Brewster •
The Boy Who Stole the Elephant (1970, TV Movie) as Colonel Rufus Ryder •
Night Gallery, "The Diary" (1971) as Dr. Mill (segment "The Diary") •
Mooch Goes to Hollywood (1971, TV Movie) as Himself (uncredited) •
The Good Life (1971–1972) as Charles Dutton •
The Catcher (1972, TV Movie) as Armand Faber •
The Dark Side (1972) (unsold pilot) •
The Streets of San Francisco (1972, TV Series) as Wally Sensibaugh •
Banacek ("Ten Thousand Dollars a Page") (1973) as Walter Tyson •
Hawaii Five-O ("30,000 Rooms and I Have the Key") (1974) as Monsieur Bordeaux •
Return of the Big Cat (1974, TV Movie) as Grandpa Jubal •
Barney Miller ("Bureaucrat") (1975) as E. J. Heiss •
Gunsmoke ("I Have Promises to Keep") (1973-1975) as Reverend Byrne / Judge Warfield • ''
It's a Bird...It's a Plane...It's Superman'' (1975, TV Movie) as Dr. Abner Sedgwick •
Ellery Queen (1975–1976) as Inspector Richard Queen •
Once an Eagle (1976, TV Mini-Series) as Colonel Terwilliger •
In the Glitter Palace (1977, TV Movie) as Nate Redstone •
Hunter ("Yesterday Upon the Stair") (1977) •
Black Beauty (1978, TV Mini-Series) as Mr. Dowling / Narrator •
Loose Change (1978, TV Mini-Series) as Dr. Moe Sinden •
Murder at the Mardi Gras (1978, TV Movie) as Mickey Mills •
Dallas (1978) as Digger Barnes •
The Gift of Love (1978, TV Movie) as O'Henry / Narrator •
The Girls in the Office (1979, TV Movie) as Ben Nayfack •
An American Christmas Carol (1979, TV Movie) as Merrivale •
Eight is Enough (1980) as Matt •
House Calls (1979–1982) as Dr. Amos Weatherby •
Matt Houston (1984) S2/Ep20, "Blood Ties" as Bill Houston •
Murder, She Wrote (1985, TV Series) as Cyrus Leffingwell •
Newhart (1985, TV Series) as Mr. Pittman (episode "Pirate Pete") •
The Golden Girls (1986) as Big Daddy •
Poker Alice (1987, TV Movie, based on the frontier gambler
Poker Alice, with
Elizabeth Taylor in the starring role) as Amos (final film role) ==Stage appearances==