Stockwell was a child actor in movies dating back to 1945, when he was 9 years old. He was perhaps best known for his role in "The Secret Garden".
As an adult, he was more active in TV, where two of his most well-known roles were in "Quantum Leap" and "Battlestar Galactica".
He had two children; a son born in 1983 and a daughter in 1985.