Complex sentence: On television, Duncan appeared on a number of television programs including "Perry Mason", "Pony Express", "Maverick", Wyatt Earp (TV Series), "Colt.45", "Bat Masterson," and "Sea Hunt".
Split into simpler sentences: On television, Duncan appeared on a number of television programs. Other television appearances included "Pony Express", "Maverick", Wyatt Earp (TV Series), "Colt.45", "Bat Masterson," and "Sea Hunt".