The son of actors, juvenile performer Clint Howard began showing up on screen in the mid-1960s, usually in the TV series and feature films co-starring his older brother Ron Howard. Clint's best-known TV guest appearances include the part of Balok in the 1966 Star Trek episode "The Corbomite Maneuver," and his vivid portrayal of a youthful prognosticator in the opening installment of Night Gallery's 1971-72 season. He was starred in the 1967 Ivan Tors theatrical feature Gentle Giant and in that property's TV-series spin-off Gentle Ben. Upon attaining adulthood, Howard was mostly consigned to character parts; he has also been featured in the films directed by his brother Ron Howard, from Eat My Dust (1978) to Apollo 13 (1995).