She got her big break on “Dr. Who,” and went on to the “Guardians of the Galaxy” and “Avengers” films, now Karen Gillan has written, directed and stars in "The Party's Just Beginning.” I ask her what it was like directing a feature for the first time while taking on such an emotionally fraught role. And she tells the story of a revelation she had about her acting, early in her career, that changed everything. Plus she tells how she turns that frenzied fandom into focused fuel for her work.