Buono appeared in four episodes of "Perry Mason". In season 5, (March 17, 1962), he portrayed Alexander Glovatsky, a small-town sculptor, in "The Case of the Absent Artist". In season 7, (April 2, 1964), he played murderer John (Jack) Sylvester Fossette in the episode "The Case of the Simple Simon". In season 8, (April 29, 1965) he played murderer Nathon Fallon in "The Case of the Grinning Gorilla". In season 9, (February 27, 1966), he appeared in "The Case of the Twice Told Twist", the only color episode, as Ben Huggins, the ringleader of a car-stripping ring.