Complex sentence: Semple also served as Executive Story Editor, a capacity in which he put his writing imprint on all of the first season's scripts, and at the same time provided the screenplay for the 1966 "Batman" feature film version.
Split into simpler sentences: Semple also served as Executive Story Editor, a capacity in which he put his writing imprint on all of the first season's scripts. At the same time he provided the screenplay for the 1966 "Batman" feature film version.