De Vol was also an actor specializing in deadpan comic characters, especially as the dour bandleader Happy Kyne on the talk show parodies "Fernwood 2 Night" and "America 2-Night", in 1977–78. He also had a recurring role in "I'm Dickens, He's Fenster", as Myron Bannister, Dickens & Fenster's boss; as well as appearances on "The Cara Williams Show", "I Dream of Jeannie", "Gidget," "Bonanza", "Petticoat Junction" - (1967 episode: "That Was the Night That Was" & 1969 episode: "The Organ Fund" - as Reverend Barton), "Mickey" starring Mickey Rooney, "The Brady Bunch", "Get Smart" (at least 2 appearances as Professor Carleton) and "The Jeffersons". De Vol had also comic roles as Chief Eaglewood, the head of the Thundercloud Boys' Camp in 1961's "The Parent Trap", and as the onscreen narrator in Jerry Lewis's 1967 comedy film "The Big Mouth".