Although Kat Stewart is well known for playing dark, in-your-face characters, her life experience has led her to a greater appreciation of hope and contentment. Her latest stage role is in Melbourne Theatre Company’s Heisenberg. “The idea I really love is that we spend all this energy trying to control our lives and take comfort in that … but we have very, very, very little control and what this play confronts you with is: What if that is not a bad thing?”