beginning in 1952 on nbc's "cavalcade of america", clark worked sporadically on television shows. his television credits include "dennis the menace" (1959), "the twilight zone" (1963), "gilligan's island" (1964), "perry mason" (1963–65), and "i dream of jeannie" (1965). his final work in television was from 1967-68 on "the high chaparral". his work on "ben casey" garnered him an emmy award nomination in 1963.