•
Dramatic School (1938) as Ramy •
Never Say Die (1939) Bit Part (uncredited) • ''
It's a Wonderful World'' (1939) as Delmonico, Stage Manager •
On Borrowed Time (1939) as Man in Convertible (uncredited) •
Dulcy (1940) as Vincent Leach •
The Great Dictator (1940) as Undetermined Role (uncredited) •
Bitter Sweet (1940) as Rudolph – Man at Mama Luden's (uncredited) •
Maisie Was a Lady (1941) as Georgie Porgie – House Guest (uncredited) •
Abdul the Bulbul-Ameer (1941, short subject) as Abdul (voice, uncredited) •
They Met in Argentina (1941) as Guitar Player in Cantina (uncredited) •
Underground (1941) as Herman – Underground Member (uncredited) •
Unexpected Uncle (1941) as Clayton – Manager at Brocks (uncredited) •
Weekend for Three (1941) as Desk Clerk •
More About Nostradamus (1941) (uncredited) •
The Gay Falcon (1941) as Herman (uncredited) •
A Date with the Falcon (1942) as Desk Clerk (uncredited) •
Joan of Paris (1942) as Second Gestapo Agent (uncredited) • ''
Blondie's Blessed Event'' (1942) as George Wickley •
Saboteur (1942) as Edward (uncredited) •
The Wife Takes a Flyer (1942) as Hendrik Woverman •
Pacific Rendezvous (1942) as Park Hotel Desk Clerk (uncredited) •
The Falcon Takes Over (1942) as Quincey W. Marriot (uncredited) •
The Big Street (1942) as Louie – Headwaiter (uncredited) •
The Greatest Gift (1942, short subject) as Father Fabian (uncredited) •
Once Upon a Honeymoon (1942) as Vienna Tailor's Fitter (uncredited) •
Nightmare (1942) as Hans – Nazi Agent •
Underground Agent (1942) as Hugo • ''
Hitler's Children'' (1943) as Dr. Graf •
Journey into Fear (1943) as Swami Magician •
Hostages (1943) as Lt. Glasenapp •
A Lady Takes a Chance (1943) as Gregg Stone •
Crazy House (1943) as Roco • ''
His Butler's Sister'' (1943) as Reeves •
Passage to Marseille (1944) as Jourdain (uncredited) •
Mrs. Parkington (1944) as Mr. Ernst •
Sliphorn King of Polaroo (1945, short subject) as Narrator / Crocodile (voice)) (voice, uncredited) •
The Senator Was Indiscreet (1947) as Waiter •
Variety Time (1948) as Rudy La Paix •
Design for Death (1948) as Narrator (Japanese) •
The Barkleys of Broadway (1949) as Ladislaus Ladi •
My Friend Irma (1949) as Prof. Kropotkin •
Bride for Sale (1949) as Jewelry Salesman (uncredited) •
On the Town (1949) as François – Head Waiter (uncredited) •
Nancy Goes to Rio (1950) as Alfredo •
Summer Stock (1950) as Harrison I. Keath •
One Hour in Wonderland (1950) as Slave in the Magic Mirror • ''
New Mexico'' (1951) as
Abraham Lincoln •
Rich, Young and Pretty (1951) as Jean – Maitre D' •
Behave Yourself! (1951) as Norbert 'Gillie the Blade' Gillespie •
Texas Carnival (1951) as Hotel Clerk •
Too Young to Kiss (1951) as Mr. Sparrow • ''
I'll See You in My Dreams'' (1951) as William Rossiter (uncredited) •
The Light Touch (1951) as Leopold (uncredited) •
The World in His Arms (1952) as Eustace – Hotel Clerk •
3 for Bedroom C (1952) as Jack Bleck – Press Agent •
Big Jim McLain (1952) as Robert Henried •
I Love Lucy (1952) as English Professor Mr. Livermore and as junk dealer •
Peter Pan (1953) as Captain Hook / Mr. George Darling / Lookout Pirate [TV adaptation] • ''
You're Never Too Young'' (1955) as François (uncredited) •
The Birds and the Bees (1956) as Duc Jacques de Montaigne •
Bus Stop (1956) as Life Magazine Photographer •
Carnival in Munich (1956, short subject) as Narrator •
The Story of Anyburg U.S.A. (1957, short subject) as Prosecutor (voice, uncredited) •
The Monster That Challenged the World (1957) as Dr. Jess Rogers •
Jet Pilot (1957) as Colonel Matoff (originally filmed in 1949) •
The Big Beat (1958) as Vladimir Skilsky •
Maverick (1958) (episode – Black Fire) as Homer Eakins •
Rock-A-Bye Baby (1958) as Mr. Wright •
Sleeping Beauty (1959) as King Stefan (demo voice/live-action reference) •
Juke Box Rhythm (1959) as Balenko •
The Real McCoys (1959) (episode – The Actor) as Sterling Ames •
The Alphabet Conspiracy (1959) as Mad Hatter •
1001 Arabian Nights (1959) as The Wicked Wazir / Magic Flame (voice) •
The Magic Fountain (1961) as Otto the Owl (voice) •
The Bullwinkle Show (1961–1965) as Snidely Whiplash (voice) •
Mister Ed (1962) (episode – Ed and Paul Revere) as Igor •
Fractured Flickers (1963–1964, 26 episodes) as Host •
My Six Loves (1963) as Kinsley Kross •
Robin and the 7 Hoods (1964) as Mr. Ricks – Architect (uncredited) •
The Patsy (1964) as Prof. Mulerr • ''
Gilligan's Island'' (1964–1965, 2 episodes) as Wrongway Feldman •
Hoppity Hooper (1961, 1963–1967, 104 episodes) as Professor Waldo Wigglesworth (voice) • ''
Hogan's Heroes'' (1966, episode #15) as Major Bonacelli •
Lost in Space (1967, 1 episode) as Sagramonte •
The Cricket on the Hearth (1967) as Tackleton (voice) •
The Monkees (1968, TV) (episode – Monkee's Paw) as Mendrek the Magician •
Wake Me When the War Is Over (1969, TV) as Professor Herman Erhardt •
The Phantom Tollbooth (1970) as King Azaz/The Mathemagician (voice) •
Horton Hears a Who! (1970) as Narrator/Horton/Dr. H. Hoovey (voice) • ''
O'Hara, U.S. Treasury'' (1972) (episode – Operation: Dorias) as Count Anton Brelius •
Dr. Seuss on the Loose (1973) as Narrator/North-going Zax/South-going Zax (voice) • ''
The Brothers O'Toole'' (1973) as Polonius Vandergelt • "Amazing Grace" (1974) as Gov. Andy Wallace •
Kolchak: The Night Stalker (1975) (episode – The Knightly Murders) as Mendel Boggs •
The Shaggy D.A. (1976) as Professor Whatley •
The Magic Pony (1977) as Spalnik (voice) •
The Hobbit (1977) as
Thorin Oakenshield (voice) •
Halloween Is Grinch Night (1977) as
The Grinch/Narrator (voice) •
Quark (1977) as The Source (voice) •
The Cat from Outer Space (1978) as Dr. Heffel •
Every Girl Should Have One (1978) as Various (voices) •
Alice (1979, 2 episodes) as Randolph Briggs • "The Love Boat" (1979) S2 E18 as Karl Schmidt •
Oh, God! Book II (1980) as Dr. Barnes •
Drak Pack (1980, 16 episodes) as Dr. Dread (voice) •
Scruffy (1980) as Joe Tibbles/Solo the Scottish Terrier (voice) •
Faeries (1981) as Faerie King/Shadow (voice) •
The Trolls and the Christmas Express (1981) as Troglo (voice) •
Spider-Man and His Amazing Friends (1981) as Chameleon (voice) •
Miss Switch to the Rescue (1982) as Mordo, the Warlock (voice) (final appearance) • Barefoot in the Park (1982) as Victor Velasco (TV stage production with Richard Thomas, Bess Armstrong, Barbara Barrie, and James Cromwell) ==References==