Early in 1959 in a show starring Bette Davis, he played one of seven children in The Ella Lindstrom Story which aired on Feb 4 1959.

The series aired for five seasons, first on NBC with Don DeFore and Whitney Blake in the role of Harold's parents, George and Dorothy Baxter.

In the fifth and final season (1965–1966) shown on CBS, the series was retooled after DeFore and Blake were dismissed and Harold lived with his Uncle Steve Baxter (Ray Fulmer), Aunt Barbara (Lynn Borden), and cousin Susie (Julia Benjamin).

[6][7] During the run of Hazel, Buntrock was tutored on the set and attended Lake Marie Public School[8] in Whittier when the show was on hiatus.

Buntrock moved with his family to Keystone, South Dakota, where he graduated from Sturgis Brown High School in 1970, and lived for the last five years of his life.