Complex sentence: Young's final television series, "Marcus Welby, M.D." (1969--76), co-starring a young James Brolin, earned Young an Emmy for best leading actor in a drama series.
Split into simpler sentences: Young's final television series was "Marcus Welby, M.D." (1969--76), co-starring a young James Brolin. This show earned Young an Emmy for best leading actor in a drama series.