Not of all of Harrington's TV work was confined to comedy. He also was especially fine in several dramatic episodes of "Owen Marshall, Counselor at Law" and the legal drama "Savage" (NBC, 1973). Harrington starred in the 1977 NBC comedy movie "Benny and Barney: Las Vegas Undercover". Since the late 80s, he has found a second career as a voice actor in such animated series and specials as "A Garfield Christmas" (CBS, 1987) and "I Yabba-Dabba Do!" (ABC, 1993).
On the big screen, Harrington made his feature film debut with a small role in the 1958 remake of "Stage Struck". But possibly his best role was as the leader of automated midgets in "The President's Analyst" (1967), in which he appears towards the end seemingly in real control of the world. Harrington narrated the 1974 hit animated film "Fritz the Cat" and, more recently, appeared in the independent feature "Road Trip to Heaven" (1992).