An early member of the Actors Studio, he began his career on the New York stage, winning a Tony Award for Best Actor in a Play for Robert Anderson’s "You Know I Can't Hear You When the Water's Running" (1968). His best known film roles include Juror #1 in "12 Angry Men" (1957), detective Milton Arbogast in "Psycho" (1960), Arnold Burns in "A Thousand Clowns" (1965) (for which he won the Academy Award for Best Supporting Actor), Colonel Cathcart in "Catch-22" (1970), Mr. Green in "The Taking of Pelham One Two Three" (1974), Signor Bianchi in "Murder on the Orient Express" (1974), and Howard Simons in "All the President's Men" (1976). He also had a starring role as Murray Klein in the television sitcom "Archie Bunker's Place" (1979–83).